63711957 has 4 divisors (see below), whose sum is σ = 84949280. Its totient is φ = 42474636.

The previous prime is 63711943. The next prime is 63711961. The reversal of 63711957 is 75911736.

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 not a de Polignac number, because 63711957 - 2⁴ = 63711941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63716957) 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, 10618657 + ... + 10618662.

It is an arithmetic number, because the mean of its divisors is an integer number (21237320).

Almost surely, 2^63711957 is an apocalyptic number.

It is an amenable number.

63711957 is a deficient number, since it is larger than the sum of its proper divisors (21237323).

63711957 is a wasteful number, since it uses less digits than its factorization.

63711957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21237322.

The product of its digits is 39690, while the sum is 39.

The square root of 63711957 is about 7981.9770107411. The cubic root of 63711957 is about 399.3990078901.

The spelling of 63711957 in words is "sixty-three million, seven hundred eleven thousand, nine hundred fifty-seven".