63874521 has 32 divisors (see below), whose sum is σ = 97430400. Its totient is φ = 41342400.

The previous prime is 63874507. The next prime is 63874529. The reversal of 63874521 is 12547836.

63874521 is a `hidden beast` number, since 63 + 8 + 74 + 521 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-63874521 is a prime.

It is an alternating number because its digits alternate between even and odd.

Its product of digits (40320) is a multiple of the sum of its prime divisors (560).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63874529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160695 + ... + 161091.

It is an arithmetic number, because the mean of its divisors is an integer number (3044700).

Almost surely, 2^63874521 is an apocalyptic number.

It is an amenable number.

63874521 is a deficient number, since it is larger than the sum of its proper divisors (33555879).

63874521 is a wasteful number, since it uses less digits than its factorization.

63874521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 560 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 63874521 is about 7992.1537147380. The cubic root of 63874521 is about 399.7384143864.

The spelling of 63874521 in words is "sixty-three million, eight hundred seventy-four thousand, five hundred twenty-one".