63919887 has 16 divisors (see below), whose sum is σ = 88649088. Its totient is φ = 40934880.

The previous prime is 63919883. The next prime is 63919903. The reversal of 63919887 is 78891936.

It is not a de Polignac number, because 63919887 - 2² = 63919883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63919883) by changing a digit.

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, 3808 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (5540568).

Almost surely, 2^63919887 is an apocalyptic number.

63919887 is a deficient number, since it is larger than the sum of its proper divisors (24729201).

63919887 is a wasteful number, since it uses less digits than its factorization.

63919887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230.

The product of its digits is 653184, while the sum is 51.

The square root of 63919887 is about 7994.9913696013. The cubic root of 63919887 is about 399.8330282274.

The spelling of 63919887 in words is "sixty-three million, nine hundred nineteen thousand, eight hundred eighty-seven".