64968399 has 40 divisors (see below), whose sum is σ = 103754112. Its totient is φ = 40415760.

The previous prime is 64968389. The next prime is 64968403. The reversal of 64968399 is 99386946.

It is a happy number.

It is not a de Polignac number, because 64968399 - 2⁸ = 64968143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64968329) 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 in 39 ways as a sum of consecutive naturals, for example, 79704 + ... + 80514.

Almost surely, 2^64968399 is an apocalyptic number.

64968399 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

64968399 is a deficient number, since it is larger than the sum of its proper divisors (38785713).

64968399 is a wasteful number, since it uses less digits than its factorization.

64968399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 880 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 64968399 is about 8060.2976992168. The cubic root of 64968399 is about 402.0074068584.

The spelling of 64968399 in words is "sixty-four million, nine hundred sixty-eight thousand, three hundred ninety-nine".