63977604 has 12 divisors (see below), whose sum is σ = 149281104. Its totient is φ = 21325864.

The previous prime is 63977539. The next prime is 63977609. The reversal of 63977604 is 40677936.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (63977609) 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, 2665722 + ... + 2665745.

It is an arithmetic number, because the mean of its divisors is an integer number (12440092).

Almost surely, 2^63977604 is an apocalyptic number.

It is an amenable number.

63977604 is an abundant number, since it is smaller than the sum of its proper divisors (85303500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63977604 is a wasteful number, since it uses less digits than its factorization.

63977604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331474 (or 5331472 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 42.

The square root of 63977604 is about 7998.6001275223. The cubic root of 63977604 is about 399.9533362231.

It can be divided in two parts, 6 and 3977604, that added together give a triangular number (3977610 = T₂₈₂₀).

The spelling of 63977604 in words is "sixty-three million, nine hundred seventy-seven thousand, six hundred four".