63939959 has 12 divisors (see below), whose sum is σ = 69320664. Its totient is φ = 58925232.

The previous prime is 63939947. The next prime is 63939961. The reversal of 63939959 is 95993936.

It is not a de Polignac number, because 63939959 - 2¹² = 63935863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63939959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63939929) 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, 10964 + ... + 15750.

It is an arithmetic number, because the mean of its divisors is an integer number (5776722).

Almost surely, 2^63939959 is an apocalyptic number.

63939959 is a deficient number, since it is larger than the sum of its proper divisors (5380705).

63939959 is a wasteful number, since it uses less digits than its factorization.

63939959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4843 counting only the distinct ones).

The product of its digits is 1771470, while the sum is 53.

The square root of 63939959 is about 7996.2465569791. The cubic root of 63939959 is about 399.8748754470.

The spelling of 63939959 in words is "sixty-three million, nine hundred thirty-nine thousand, nine hundred fifty-nine".