64723773 has 4 divisors (see below), whose sum is σ = 86298368. Its totient is φ = 43149180.

The previous prime is 64723739. The next prime is 64723781. The reversal of 64723773 is 37732746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64723773 - 2⁸ = 64723517 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 (64723723) 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, 10787293 + ... + 10787298.

It is an arithmetic number, because the mean of its divisors is an integer number (21574592).

Almost surely, 2^64723773 is an apocalyptic number.

It is an amenable number.

64723773 is a deficient number, since it is larger than the sum of its proper divisors (21574595).

64723773 is a wasteful number, since it uses less digits than its factorization.

64723773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21574594.

The product of its digits is 148176, while the sum is 39.

The square root of 64723773 is about 8045.1086381726. The cubic root of 64723773 is about 401.5022117539.

The spelling of 64723773 in words is "sixty-four million, seven hundred twenty-three thousand, seven hundred seventy-three".