68523931 has 4 divisors (see below), whose sum is σ = 78313072. Its totient is φ = 58734792.

The previous prime is 68523913. The next prime is 68523953. The reversal of 68523931 is 13932586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68523931 - 2¹³ = 68515739 is a prime.

It is a super-2 number, since 2×68523931² = 9391058239385522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68523901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4894560 + ... + 4894573.

It is an arithmetic number, because the mean of its divisors is an integer number (19578268).

Almost surely, 2^68523931 is an apocalyptic number.

68523931 is a deficient number, since it is larger than the sum of its proper divisors (9789141).

68523931 is an equidigital number, since it uses as much as digits as its factorization.

68523931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9789140.

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

The square root of 68523931 is about 8277.9182769583. The cubic root of 68523931 is about 409.2111164309.

The spelling of 68523931 in words is "sixty-eight million, five hundred twenty-three thousand, nine hundred thirty-one".