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68496061 = 471457363
BaseRepresentation
bin1000001010100…
…10101010111101
311202212221221011
410011102222331
5120013333221
610444035221
71461130654
oct405225275
9152787834
1068496061
1135734117
121ab32b11
131126311a
14915019b
1560301e1
hex4152abd

68496061 has 4 divisors (see below), whose sum is σ = 69953472. Its totient is φ = 67038652.

The previous prime is 68496059. The next prime is 68496067. The reversal of 68496061 is 16069486.

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.

It is a cyclic number.

It is not a de Polignac number, because 68496061 - 21 = 68496059 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68496067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728635 + ... + 728728.

It is an arithmetic number, because the mean of its divisors is an integer number (17488368).

Almost surely, 268496061 is an apocalyptic number.

It is an amenable number.

68496061 is a deficient number, since it is larger than the sum of its proper divisors (1457411).

68496061 is a wasteful number, since it uses less digits than its factorization.

68496061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457410.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 68496061 is about 8276.2347115098. The cubic root of 68496061 is about 409.1556308987.

The spelling of 68496061 in words is "sixty-eight million, four hundred ninety-six thousand, sixty-one".

Divisors: 1 47 1457363 68496061