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68762849 = 142748187
BaseRepresentation
bin1000001100100…
…11110011100001
311210101111220012
410012103303201
5120100402344
610453454305
71463321531
oct406236341
9153344805
1068762849
11358a6601
121b041395
131132769c
1491bd4c1
15608429e
hex4193ce1

68762849 has 4 divisors (see below), whose sum is σ = 68812464. Its totient is φ = 68713236.

The previous prime is 68762831. The next prime is 68762851. The reversal of 68762849 is 94826786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94826786 = 247413393.

It is a cyclic number.

It is not a de Polignac number, because 68762849 - 28 = 68762593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68762797 and 68762806.

It is not an unprimeable number, because it can be changed into a prime (68762809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22667 + ... + 25520.

It is an arithmetic number, because the mean of its divisors is an integer number (17203116).

Almost surely, 268762849 is an apocalyptic number.

It is an amenable number.

68762849 is a deficient number, since it is larger than the sum of its proper divisors (49615).

68762849 is a wasteful number, since it uses less digits than its factorization.

68762849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49614.

The product of its digits is 1161216, while the sum is 50.

The square root of 68762849 is about 8292.3367635426. The cubic root of 68762849 is about 409.6861548233.

It can be divided in two parts, 687 and 62849, that added together give a palindrome (63536).

The spelling of 68762849 in words is "sixty-eight million, seven hundred sixty-two thousand, eight hundred forty-nine".

Divisors: 1 1427 48187 68762849