63902081 has 4 divisors (see below), whose sum is σ = 63934464. Its totient is φ = 63869700.

The previous prime is 63902063. The next prime is 63902087. The reversal of 63902081 is 18020936.

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 a de Polignac number, because none of the positive numbers 2^k-63902081 is a prime.

It is a super-2 number, since 2×63902081² = 8166951912261122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63902087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13025 + ... + 17246.

It is an arithmetic number, because the mean of its divisors is an integer number (15983616).

Almost surely, 2^63902081 is an apocalyptic number.

It is an amenable number.

63902081 is a deficient number, since it is larger than the sum of its proper divisors (32383).

63902081 is a wasteful number, since it uses less digits than its factorization.

63902081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32382.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 63902081 is about 7993.8777198554. The cubic root of 63902081 is about 399.7958979569.

The spelling of 63902081 in words is "sixty-three million, nine hundred two thousand, eighty-one".