13973324065 has 4 divisors (see below), whose sum is σ = 16767988884. Its totient is φ = 11178659248.

The previous prime is 13973324017. The next prime is 13973324081. The reversal of 13973324065 is 56042337931.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1753348129 + 12219975936 = 41873^2 + 110544^2 .

It is a cyclic number.

It is not a de Polignac number, because 13973324065 - 2⁷ = 13973323937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397332402 + ... + 1397332411.

It is an arithmetic number, because the mean of its divisors is an integer number (4191997221).

Almost surely, 2^13973324065 is an apocalyptic number.

It is an amenable number.

13973324065 is a deficient number, since it is larger than the sum of its proper divisors (2794664819).

13973324065 is an equidigital number, since it uses as much as digits as its factorization.

13973324065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794664818.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 13973324065 in words is "thirteen billion, nine hundred seventy-three million, three hundred twenty-four thousand, sixty-five".