63899137 has 4 divisors (see below), whose sum is σ = 63929776. Its totient is φ = 63868500.

The previous prime is 63899131. The next prime is 63899149. The reversal of 63899137 is 73199836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63899137 - 2²³ = 55510529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63899131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11943 + ... + 16444.

It is an arithmetic number, because the mean of its divisors is an integer number (15982444).

Almost surely, 2^63899137 is an apocalyptic number.

It is an amenable number.

63899137 is a deficient number, since it is larger than the sum of its proper divisors (30639).

63899137 is a wasteful number, since it uses less digits than its factorization.

63899137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30638.

The product of its digits is 244944, while the sum is 46.

The square root of 63899137 is about 7993.6935768142. The cubic root of 63899137 is about 399.7897582654.

Adding to 63899137 its product of digits (244944), we get a square (64144081 = 8009²).

The spelling of 63899137 in words is "sixty-three million, eight hundred ninety-nine thousand, one hundred thirty-seven".