64745999 has 2 divisors, whose sum is σ = 64746000. Its totient is φ = 64745998.

The previous prime is 64745971. The next prime is 64746001. The reversal of 64745999 is 99954746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64745999 - 2²⁰ = 63697423 is a prime.

Together with 64746001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64745999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64745909) 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, 32372999 + 32373000.

It is an arithmetic number, because the mean of its divisors is an integer number (32373000).

Almost surely, 2^64745999 is an apocalyptic number.

64745999 is a deficient number, since it is larger than the sum of its proper divisors (1).

64745999 is an equidigital number, since it uses as much as digits as its factorization.

64745999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 53.

The square root of 64745999 is about 8046.4898558315. The cubic root of 64745999 is about 401.5481648170.

The spelling of 64745999 in words is "sixty-four million, seven hundred forty-five thousand, nine hundred ninety-nine".