63939955 has 16 divisors (see below), whose sum is σ = 77798880. Its totient is φ = 50444032.

The previous prime is 63939947. The next prime is 63939961. The reversal of 63939955 is 55993936.

It is a cyclic number.

It is not a de Polignac number, because 63939955 - 2³ = 63939947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63939899 and 63939908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184092 + ... + 184438.

It is an arithmetic number, because the mean of its divisors is an integer number (4862430).

Almost surely, 2^63939955 is an apocalyptic number.

63939955 is a deficient number, since it is larger than the sum of its proper divisors (13858925).

63939955 is a wasteful number, since it uses less digits than its factorization.

63939955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its digits is 984150, while the sum is 49.

The square root of 63939955 is about 7996.2463068617. The cubic root of 63939955 is about 399.8748671085.

The spelling of 63939955 in words is "sixty-three million, nine hundred thirty-nine thousand, nine hundred fifty-five".