64967399 has 16 divisors (see below), whose sum is σ = 75602688. Its totient is φ = 54680832.

The previous prime is 64967369. The next prime is 64967417. The reversal of 64967399 is 99376946.

It is a cyclic number.

It is not a de Polignac number, because 64967399 - 2⁸ = 64967143 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 64967399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64967339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110384 + ... + 110970.

It is an arithmetic number, because the mean of its divisors is an integer number (4725168).

Almost surely, 2^64967399 is an apocalyptic number.

64967399 is a deficient number, since it is larger than the sum of its proper divisors (10635289).

64967399 is a wasteful number, since it uses less digits than its factorization.

64967399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854.

The product of its digits is 2204496, while the sum is 53.

The square root of 64967399 is about 8060.2356665299. The cubic root of 64967399 is about 402.0053442686.

The spelling of 64967399 in words is "sixty-four million, nine hundred sixty-seven thousand, three hundred ninety-nine".