13964399 has 4 divisors (see below), whose sum is σ = 14445960. Its totient is φ = 13482840.

The previous prime is 13964393. The next prime is 13964407. The reversal of 13964399 is 99346931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13964399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13964393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240737 + ... + 240794.

It is an arithmetic number, because the mean of its divisors is an integer number (3611490).

Almost surely, 2^13964399 is an apocalyptic number.

13964399 is a deficient number, since it is larger than the sum of its proper divisors (481561).

13964399 is an equidigital number, since it uses as much as digits as its factorization.

13964399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481560.

The product of its digits is 157464, while the sum is 44.

The square root of 13964399 is about 3736.8969747640. The cubic root of 13964399 is about 240.8097590166.

The spelling of 13964399 in words is "thirteen million, nine hundred sixty-four thousand, three hundred ninety-nine".