64599923 has 2 divisors, whose sum is σ = 64599924. Its totient is φ = 64599922.

The previous prime is 64599919. The next prime is 64599929. The reversal of 64599923 is 32999546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64599923 - 2² = 64599919 is a prime.

It is not a weakly prime, because it can be changed into another prime (64599929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32299961 + 32299962.

It is an arithmetic number, because the mean of its divisors is an integer number (32299962).

Almost surely, 2^64599923 is an apocalyptic number.

64599923 is a deficient number, since it is larger than the sum of its proper divisors (1).

64599923 is an equidigital number, since it uses as much as digits as its factorization.

64599923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 47.

The square root of 64599923 is about 8037.4077288638. The cubic root of 64599923 is about 401.2459545469.

The spelling of 64599923 in words is "sixty-four million, five hundred ninety-nine thousand, nine hundred twenty-three".