7964399 has 4 divisors (see below), whose sum is σ = 7990320. Its totient is φ = 7938480.

The previous prime is 7964393. The next prime is 7964413. The reversal of 7964399 is 9934697.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7964399 - 2²⁰ = 6915823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7964393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12494 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (1997580).

Almost surely, 2^7964399 is an apocalyptic number.

7964399 is a deficient number, since it is larger than the sum of its proper divisors (25921).

7964399 is a wasteful number, since it uses less digits than its factorization.

7964399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25920.

The product of its digits is 367416, while the sum is 47.

The square root of 7964399 is about 2822.1266803600. The cubic root of 7964399 is about 199.7028838285.

The spelling of 7964399 in words is "seven million, nine hundred sixty-four thousand, three hundred ninety-nine".