64068399 has 12 divisors (see below), whose sum is σ = 97414200. Its totient is φ = 40464144.

The previous prime is 64068391. The next prime is 64068419. The reversal of 64068399 is 99386046.

It is not a de Polignac number, because 64068399 - 2³ = 64068391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64068391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187164 + ... + 187505.

It is an arithmetic number, because the mean of its divisors is an integer number (8117850).

Almost surely, 2^64068399 is an apocalyptic number.

64068399 is a deficient number, since it is larger than the sum of its proper divisors (33345801).

64068399 is a wasteful number, since it uses less digits than its factorization.

64068399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374694 (or 374691 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 64068399 is about 8004.2737959168. The cubic root of 64068399 is about 400.1424471826.

The spelling of 64068399 in words is "sixty-four million, sixty-eight thousand, three hundred ninety-nine".