63931378 has 12 divisors (see below), whose sum is σ = 111553902. Its totient is φ = 27399120.

The previous prime is 63931369. The next prime is 63931391. The reversal of 63931378 is 87313936.

It can be written as a sum of positive squares in only one way, i.e., 57259489 + 6671889 = 7567^2 + 2583^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63931378.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 326083 + ... + 326278.

Almost surely, 2^63931378 is an apocalyptic number.

63931378 is a deficient number, since it is larger than the sum of its proper divisors (47622524).

63931378 is a wasteful number, since it uses less digits than its factorization.

63931378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652377 (or 652370 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 63931378 is about 7995.7099747302. The cubic root of 63931378 is about 399.8569863739.

The spelling of 63931378 in words is "sixty-three million, nine hundred thirty-one thousand, three hundred seventy-eight".