63879939 has 12 divisors (see below), whose sum is σ = 92537016. Its totient is φ = 42463872.

The previous prime is 63879887. The next prime is 63879943. The reversal of 63879939 is 93997836.

It is not a de Polignac number, because 63879939 - 2¹² = 63875843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63839939) 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, 6877 + ... + 13230.

It is an arithmetic number, because the mean of its divisors is an integer number (7711418).

Almost surely, 2^63879939 is an apocalyptic number.

63879939 is a deficient number, since it is larger than the sum of its proper divisors (28657077).

63879939 is a wasteful number, since it uses less digits than its factorization.

63879939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20466 (or 20463 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 63879939 is about 7992.4926649951. The cubic root of 63879939 is about 399.7497163446.

The spelling of 63879939 in words is "sixty-three million, eight hundred seventy-nine thousand, nine hundred thirty-nine".