64315723 has 4 divisors (see below), whose sum is σ = 65405880. Its totient is φ = 63225568.

The previous prime is 64315697. The next prime is 64315729. The reversal of 64315723 is 32751346.

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 64315723 - 2⁹ = 64315211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64315729) 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, 544990 + ... + 545107.

It is an arithmetic number, because the mean of its divisors is an integer number (16351470).

Almost surely, 2^64315723 is an apocalyptic number.

64315723 is a deficient number, since it is larger than the sum of its proper divisors (1090157).

64315723 is a wasteful number, since it uses less digits than its factorization.

64315723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090156.

The product of its digits is 15120, while the sum is 31.

The square root of 64315723 is about 8019.7084111581. The cubic root of 64315723 is about 400.6566775964.

The spelling of 64315723 in words is "sixty-four million, three hundred fifteen thousand, seven hundred twenty-three".