68772931 has 4 divisors (see below), whose sum is σ = 68904952. Its totient is φ = 68640912.

The previous prime is 68772929. The next prime is 68772983. The reversal of 68772931 is 13927786.

It is a happy number.

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 68772931 - 2¹ = 68772929 is a prime.

It is a super-2 number, since 2×68772931² = 9459432076661522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68772901) 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, 65226 + ... + 66271.

It is an arithmetic number, because the mean of its divisors is an integer number (17226238).

Almost surely, 2^68772931 is an apocalyptic number.

68772931 is a deficient number, since it is larger than the sum of its proper divisors (132021).

68772931 is a wasteful number, since it uses less digits than its factorization.

68772931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132020.

The product of its digits is 127008, while the sum is 43.

The square root of 68772931 is about 8292.9446519315. The cubic root of 68772931 is about 409.7061765551.

The spelling of 68772931 in words is "sixty-eight million, seven hundred seventy-two thousand, nine hundred thirty-one".