63400647 has 16 divisors (see below), whose sum is σ = 87262592. Its totient is φ = 40914720.

The previous prime is 63400639. The next prime is 63400651. The reversal of 63400647 is 74600436.

It is not a de Polignac number, because 63400647 - 2³ = 63400639 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 (63400607) 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, 22068 + ... + 24774.

It is an arithmetic number, because the mean of its divisors is an integer number (5453912).

Almost surely, 2^63400647 is an apocalyptic number.

63400647 is a deficient number, since it is larger than the sum of its proper divisors (23861945).

63400647 is a wasteful number, since it uses less digits than its factorization.

63400647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 63400647 is about 7962.4523232482. The cubic root of 63400647 is about 398.7474296798.

The spelling of 63400647 in words is "sixty-three million, four hundred thousand, six hundred forty-seven".