64970631 has 24 divisors (see below), whose sum is σ = 105150864. Its totient is φ = 38309760.

The previous prime is 64970611. The next prime is 64970641. The reversal of 64970631 is 13607946.

64970631 is a `hidden beast` number, since 649 + 7 + 0 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 64970631 - 2⁵ = 64970599 is a prime.

It is a super-2 number, since 2×64970631² = 8442365785076322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64970611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5206 + ... + 12531.

It is an arithmetic number, because the mean of its divisors is an integer number (4381286).

Almost surely, 2^64970631 is an apocalyptic number.

64970631 is a deficient number, since it is larger than the sum of its proper divisors (40180233).

64970631 is a wasteful number, since it uses less digits than its factorization.

64970631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17791 (or 17788 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 64970631 is about 8060.4361544522. The cubic root of 64970631 is about 402.0120104825.

The spelling of 64970631 in words is "sixty-four million, nine hundred seventy thousand, six hundred thirty-one".