68501931 has 4 divisors (see below), whose sum is σ = 91335912. Its totient is φ = 45667952.

The previous prime is 68501929. The next prime is 68501947. The reversal of 68501931 is 13910586.

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 68501931 - 2¹ = 68501929 is a prime.

It is a super-2 number, since 2×68501931² = 9385029101457522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68501892 and 68501901.

It is not an unprimeable number, because it can be changed into a prime (68501921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11416986 + ... + 11416991.

It is an arithmetic number, because the mean of its divisors is an integer number (22833978).

Almost surely, 2^68501931 is an apocalyptic number.

68501931 is a deficient number, since it is larger than the sum of its proper divisors (22833981).

68501931 is a wasteful number, since it uses less digits than its factorization.

68501931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22833980.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 68501931 is about 8276.5893337775. The cubic root of 68501931 is about 409.1673185535.

The spelling of 68501931 in words is "sixty-eight million, five hundred one thousand, nine hundred thirty-one".