63964457 has 4 divisors (see below), whose sum is σ = 64004496. Its totient is φ = 63924420.

The previous prime is 63964451. The next prime is 63964471. The reversal of 63964457 is 75446936.

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 63964457 - 2²² = 59770153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63964451) 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, 17519 + ... + 20852.

It is an arithmetic number, because the mean of its divisors is an integer number (16001124).

Almost surely, 2^63964457 is an apocalyptic number.

It is an amenable number.

63964457 is a deficient number, since it is larger than the sum of its proper divisors (40039).

63964457 is a wasteful number, since it uses less digits than its factorization.

63964457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40038.

The product of its digits is 544320, while the sum is 44.

The square root of 63964457 is about 7997.7782539903. The cubic root of 63964457 is about 399.9259383714.

The spelling of 63964457 in words is "sixty-three million, nine hundred sixty-four thousand, four hundred fifty-seven".