68932521 has 24 divisors (see below), whose sum is σ = 116573184. Its totient is φ = 38427840.

The previous prime is 68932519. The next prime is 68932553. The reversal of 68932521 is 12523986.

It is not a de Polignac number, because 68932521 - 2¹ = 68932519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68932511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10761 + ... + 15926.

It is an arithmetic number, because the mean of its divisors is an integer number (4857216).

Almost surely, 2^68932521 is an apocalyptic number.

It is an amenable number.

68932521 is a deficient number, since it is larger than the sum of its proper divisors (47640663).

68932521 is a wasteful number, since it uses less digits than its factorization.

68932521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26741 (or 26738 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 68932521 is about 8302.5611108862. The cubic root of 68932521 is about 410.0228442556.

Subtracting from 68932521 its product of digits (25920), we obtain a square (68906601 = 8301²).

The spelling of 68932521 in words is "sixty-eight million, nine hundred thirty-two thousand, five hundred twenty-one".