63765983 has 4 divisors (see below), whose sum is σ = 65964840. Its totient is φ = 61567128.

The previous prime is 63765973. The next prime is 63766007. The reversal of 63765983 is 38956736.

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 63765983 - 2⁴ = 63765967 is a prime.

It is a super-2 number, since 2×63765983² = 8132201175912578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63765973) 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, 1099385 + ... + 1099442.

It is an arithmetic number, because the mean of its divisors is an integer number (16491210).

Almost surely, 2^63765983 is an apocalyptic number.

63765983 is a deficient number, since it is larger than the sum of its proper divisors (2198857).

63765983 is a wasteful number, since it uses less digits than its factorization.

63765983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198856.

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

The square root of 63765983 is about 7985.3605428935. The cubic root of 63765983 is about 399.5118691463.

The spelling of 63765983 in words is "sixty-three million, seven hundred sixty-five thousand, nine hundred eighty-three".