63657983 has 4 divisors (see below), whose sum is σ = 63674928. Its totient is φ = 63641040.

The previous prime is 63657967. The next prime is 63658003. The reversal of 63657983 is 38975636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63657983 - 2⁴ = 63657967 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 (63657883) 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, 38 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (15918732).

Almost surely, 2^63657983 is an apocalyptic number.

63657983 is a deficient number, since it is larger than the sum of its proper divisors (16945).

63657983 is a wasteful number, since it uses less digits than its factorization.

63657983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16944.

The product of its digits is 816480, while the sum is 47.

The square root of 63657983 is about 7978.5953024326. The cubic root of 63657983 is about 399.2861915347.

The spelling of 63657983 in words is "sixty-three million, six hundred fifty-seven thousand, nine hundred eighty-three".