67108631 has 4 divisors (see below), whose sum is σ = 67158000. Its totient is φ = 67059264.

The previous prime is 67108597. The next prime is 67108633. The reversal of 67108631 is 13680176.

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 67108631 - 2¹⁴ = 67092247 is a prime.

It is a super-2 number, since 2×67108631² = 9007136709388322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67108633) 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, 22586 + ... + 25383.

It is an arithmetic number, because the mean of its divisors is an integer number (16789500).

Almost surely, 2^67108631 is an apocalyptic number.

67108631 is a deficient number, since it is larger than the sum of its proper divisors (49369).

67108631 is a wasteful number, since it uses less digits than its factorization.

67108631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49368.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 67108631 is about 8191.9857787962. The cubic root of 67108631 is about 406.3741989964.

The spelling of 67108631 in words is "sixty-seven million, one hundred eight thousand, six hundred thirty-one".