64723859 has 2 divisors, whose sum is σ = 64723860. Its totient is φ = 64723858.

The previous prime is 64723849. The next prime is 64723891. The reversal of 64723859 is 95832746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64723859 - 2⁴ = 64723843 is a prime.

It is not a weakly prime, because it can be changed into another prime (64723849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32361929 + 32361930.

It is an arithmetic number, because the mean of its divisors is an integer number (32361930).

Almost surely, 2^64723859 is an apocalyptic number.

64723859 is a deficient number, since it is larger than the sum of its proper divisors (1).

64723859 is an equidigital number, since it uses as much as digits as its factorization.

64723859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 64723859 is about 8045.1139830334. The cubic root of 64723859 is about 401.5023895823.

The spelling of 64723859 in words is "sixty-four million, seven hundred twenty-three thousand, eight hundred fifty-nine".