64345399 has 2 divisors, whose sum is σ = 64345400. Its totient is φ = 64345398.

The previous prime is 64345349. The next prime is 64345409. The reversal of 64345399 is 99354346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64345399 - 2⁷ = 64345271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64345349) 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, 32172699 + 32172700.

It is an arithmetic number, because the mean of its divisors is an integer number (32172700).

Almost surely, 2^64345399 is an apocalyptic number.

64345399 is a deficient number, since it is larger than the sum of its proper divisors (1).

64345399 is an equidigital number, since it uses as much as digits as its factorization.

64345399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 43.

The square root of 64345399 is about 8021.5583897395. The cubic root of 64345399 is about 400.7182906244.

The spelling of 64345399 in words is "sixty-four million, three hundred forty-five thousand, three hundred ninety-nine".