13512973 has 4 divisors (see below), whose sum is σ = 13652380. Its totient is φ = 13373568.

The previous prime is 13512953. The next prime is 13512979. The reversal of 13512973 is 37921531.

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 8838729 + 4674244 = 2973^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 13512973 - 2⁹ = 13512461 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 (13512979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69558 + ... + 69751.

It is an arithmetic number, because the mean of its divisors is an integer number (3413095).

Almost surely, 2^13512973 is an apocalyptic number.

It is an amenable number.

13512973 is a deficient number, since it is larger than the sum of its proper divisors (139407).

13512973 is an equidigital number, since it uses as much as digits as its factorization.

13512973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139406.

The product of its digits is 5670, while the sum is 31.

The square root of 13512973 is about 3675.9995919477. Note that the first 3 decimals coincide. The cubic root of 13512973 is about 238.1864050578.

The spelling of 13512973 in words is "thirteen million, five hundred twelve thousand, nine hundred seventy-three".