68392531 has 2 divisors, whose sum is σ = 68392532. Its totient is φ = 68392530.

The previous prime is 68392523. The next prime is 68392537. The reversal of 68392531 is 13529386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68392531 - 2³ = 68392523 is a prime.

It is a super-2 number, since 2×68392531² = 9355076593171922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68392537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34196265 + 34196266.

It is an arithmetic number, because the mean of its divisors is an integer number (34196266).

Almost surely, 2^68392531 is an apocalyptic number.

68392531 is a deficient number, since it is larger than the sum of its proper divisors (1).

68392531 is an equidigital number, since it uses as much as digits as its factorization.

68392531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 68392531 is about 8269.9776904173. The cubic root of 68392531 is about 408.9493842828.

The spelling of 68392531 in words is "sixty-eight million, three hundred ninety-two thousand, five hundred thirty-one".