63975631 has 2 divisors, whose sum is σ = 63975632. Its totient is φ = 63975630.

The previous prime is 63975623. The next prime is 63975649. The reversal of 63975631 is 13657936.

63975631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63975631 - 2³ = 63975623 is a prime.

It is a super-2 number, since 2×63975631² = 8185762723696322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63975931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31987815 + 31987816.

It is an arithmetic number, because the mean of its divisors is an integer number (31987816).

Almost surely, 2^63975631 is an apocalyptic number.

63975631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63975631 is an equidigital number, since it uses as much as digits as its factorization.

63975631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 40.

The square root of 63975631 is about 7998.4767924899. The cubic root of 63975631 is about 399.9492248050.

The spelling of 63975631 in words is "sixty-three million, nine hundred seventy-five thousand, six hundred thirty-one".