68927521 has 16 divisors (see below), whose sum is σ = 76656384. Its totient is φ = 61576704.

The previous prime is 68927501. The next prime is 68927533. The reversal of 68927521 is 12572986.

It is a cyclic number.

It is not a de Polignac number, because 68927521 - 2⁷ = 68927393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68927501) 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, 58686 + ... + 59848.

It is an arithmetic number, because the mean of its divisors is an integer number (4791024).

Almost surely, 2^68927521 is an apocalyptic number.

It is an amenable number.

68927521 is a deficient number, since it is larger than the sum of its proper divisors (7728863).

68927521 is a wasteful number, since it uses less digits than its factorization.

68927521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its digits is 60480, while the sum is 40.

The square root of 68927521 is about 8302.2599935198. The cubic root of 68927521 is about 410.0129303874.

The spelling of 68927521 in words is "sixty-eight million, nine hundred twenty-seven thousand, five hundred twenty-one".