63688031 has 16 divisors (see below), whose sum is σ = 73560960. Its totient is φ = 54589920.

The previous prime is 63687997. The next prime is 63688049. The reversal of 63688031 is 13088636.

It is a happy number.

It is not a de Polignac number, because 63688031 - 2¹⁰ = 63687007 is a prime.

It is a super-2 number, since 2×63688031² = 8112330585313922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63687982 and 63688000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63688061) 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, 11396 + ... + 16038.

It is an arithmetic number, because the mean of its divisors is an integer number (4597560).

Almost surely, 2^63688031 is an apocalyptic number.

63688031 is a deficient number, since it is larger than the sum of its proper divisors (9872929).

63688031 is a wasteful number, since it uses less digits than its factorization.

63688031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 63688031 is about 7980.4781185089. The cubic root of 63688031 is about 399.3490056741.

The spelling of 63688031 in words is "sixty-three million, six hundred eighty-eight thousand, thirty-one".