68507631 has 12 divisors (see below), whose sum is σ = 99044400. Its totient is φ = 45630720.

The previous prime is 68507617. The next prime is 68507633. The reversal of 68507631 is 13670586.

It is not a de Polignac number, because 68507631 - 2¹³ = 68499439 is a prime.

It is a super-2 number, since 2×68507631² = 9386591010464322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68507633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9871 + ... + 15311.

It is an arithmetic number, because the mean of its divisors is an integer number (8253700).

Almost surely, 2^68507631 is an apocalyptic number.

68507631 is a deficient number, since it is larger than the sum of its proper divisors (30536769).

68507631 is a wasteful number, since it uses less digits than its factorization.

68507631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846 (or 6843 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 68507631 is about 8276.9336713544. The cubic root of 68507631 is about 409.1786670853.

The spelling of 68507631 in words is "sixty-eight million, five hundred seven thousand, six hundred thirty-one".