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68812801 = 411678361
BaseRepresentation
bin1000001101000…
…00000000000001
311210111001102021
410012200000001
5120104002201
610454521441
71463620261
oct406400001
9153431367
1068812801
1135930092
121b066281
1311344345
1491d37a1
156093ea1
hex41a0001

68812801 has 4 divisors (see below), whose sum is σ = 70491204. Its totient is φ = 67134400.

The previous prime is 68812769. The next prime is 68812823. The reversal of 68812801 is 10821886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10821886 = 25410943.

It can be written as a sum of positive squares in 2 ways, for example, as 3591025 + 65221776 = 1895^2 + 8076^2 .

It is a cyclic number.

It is not a de Polignac number, because 68812801 - 25 = 68812769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68812301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839140 + ... + 839221.

It is an arithmetic number, because the mean of its divisors is an integer number (17622801).

It is a Proth number, since it is equal to 525 ⋅ 217 + 1 and 525 < 217.

Almost surely, 268812801 is an apocalyptic number.

It is an amenable number.

68812801 is a deficient number, since it is larger than the sum of its proper divisors (1678403).

68812801 is a wasteful number, since it uses less digits than its factorization.

68812801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678402.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 68812801 is about 8295.3481542368. The cubic root of 68812801 is about 409.7853347810.

It can be divided in two parts, 688 and 12801, that multiplied together give a palindrome (8807088).

The spelling of 68812801 in words is "sixty-eight million, eight hundred twelve thousand, eight hundred one".

Divisors: 1 41 1678361 68812801