68621331 has 16 divisors (see below), whose sum is σ = 98663040. Its totient is φ = 42281280.

The previous prime is 68621327. The next prime is 68621393. The reversal of 68621331 is 13312686.

It is not a de Polignac number, because 68621331 - 2² = 68621327 is a prime.

It is a super-2 number, since 2×68621331² = 9417774136423122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68621131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12345 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (6166440).

Almost surely, 2^68621331 is an apocalyptic number.

68621331 is a deficient number, since it is larger than the sum of its proper divisors (30041709).

68621331 is a wasteful number, since it uses less digits than its factorization.

68621331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29426.

The product of its digits is 5184, while the sum is 30.

The square root of 68621331 is about 8283.7993094956. The cubic root of 68621331 is about 409.4049090360.

The spelling of 68621331 in words is "sixty-eight million, six hundred twenty-one thousand, three hundred thirty-one".