68568513 has 16 divisors (see below), whose sum is σ = 99335040. Its totient is φ = 41819904.

The previous prime is 68568509. The next prime is 68568517. The reversal of 68568513 is 31586586.

It is an interprime number because it is at equal distance from previous prime (68568509) and next prime (68568517).

It is not a de Polignac number, because 68568513 - 2² = 68568509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68568517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3373 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (6208440).

Almost surely, 2^68568513 is an apocalyptic number.

It is an amenable number.

68568513 is a deficient number, since it is larger than the sum of its proper divisors (30766527).

68568513 is a wasteful number, since it uses less digits than its factorization.

68568513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15688.

The product of its digits is 172800, while the sum is 42.

The square root of 68568513 is about 8280.6106658869. The cubic root of 68568513 is about 409.2998421005.

The spelling of 68568513 in words is "sixty-eight million, five hundred sixty-eight thousand, five hundred thirteen".