63918371 has 12 divisors (see below), whose sum is σ = 71590176. Its totient is φ = 57005520.

The previous prime is 63918367. The next prime is 63918377. The reversal of 63918371 is 17381936.

It is not a de Polignac number, because 63918371 - 2² = 63918367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63918377) 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, 1430 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (5965848).

Almost surely, 2^63918371 is an apocalyptic number.

63918371 is a deficient number, since it is larger than the sum of its proper divisors (7671805).

63918371 is a wasteful number, since it uses less digits than its factorization.

63918371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10042 (or 10031 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 63918371 is about 7994.8965596811. The cubic root of 63918371 is about 399.8298672307.

The spelling of 63918371 in words is "sixty-three million, nine hundred eighteen thousand, three hundred seventy-one".