64599967 has 2 divisors, whose sum is σ = 64599968. Its totient is φ = 64599966.

The previous prime is 64599929. The next prime is 64599973. The reversal of 64599967 is 76999546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64599967 - 2⁷ = 64599839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64599917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32299983 + 32299984.

It is an arithmetic number, because the mean of its divisors is an integer number (32299984).

Almost surely, 2^64599967 is an apocalyptic number.

64599967 is a deficient number, since it is larger than the sum of its proper divisors (1).

64599967 is an equidigital number, since it uses as much as digits as its factorization.

64599967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 55.

The square root of 64599967 is about 8037.4104660643. The cubic root of 64599967 is about 401.2460456451.

The spelling of 64599967 in words is "sixty-four million, five hundred ninety-nine thousand, nine hundred sixty-seven".