64397763 has 24 divisors (see below), whose sum is σ = 94834688. Its totient is φ = 42103152.

The previous prime is 64397759. The next prime is 64397771. The reversal of 64397763 is 36779346.

It is not a de Polignac number, because 64397763 - 2² = 64397759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64397363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117456 + ... + 118002.

Almost surely, 2^64397763 is an apocalyptic number.

64397763 is a deficient number, since it is larger than the sum of its proper divisors (30436925).

64397763 is a wasteful number, since it uses less digits than its factorization.

64397763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 780 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The square root of 64397763 is about 8024.8216802618. The cubic root of 64397763 is about 400.8269620728.

The spelling of 64397763 in words is "sixty-four million, three hundred ninety-seven thousand, seven hundred sixty-three".