63974553 has 16 divisors (see below), whose sum is σ = 90567360. Its totient is φ = 40029696.

The previous prime is 63974549. The next prime is 63974557. The reversal of 63974553 is 35547936.

It is an interprime number because it is at equal distance from previous prime (63974549) and next prime (63974557).

It is not a de Polignac number, because 63974553 - 2² = 63974549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63974557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19326 + ... + 22392.

It is an arithmetic number, because the mean of its divisors is an integer number (5660460).

Almost surely, 2^63974553 is an apocalyptic number.

It is an amenable number.

63974553 is a deficient number, since it is larger than the sum of its proper divisors (26592807).

63974553 is a wasteful number, since it uses less digits than its factorization.

63974553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496.

The product of its digits is 340200, while the sum is 42.

The square root of 63974553 is about 7998.4094043753. The cubic root of 63974553 is about 399.9469783887.

The spelling of 63974553 in words is "sixty-three million, nine hundred seventy-four thousand, five hundred fifty-three".