12513997 has 4 divisors (see below), whose sum is σ = 12521920. Its totient is φ = 12506076.

The previous prime is 12513983. The next prime is 12514003. The reversal of 12513997 is 79931521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12513997 - 2⁷ = 12513869 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 (12543997) 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, 693 + ... + 5050.

It is an arithmetic number, because the mean of its divisors is an integer number (3130480).

Almost surely, 2^12513997 is an apocalyptic number.

It is an amenable number.

12513997 is a deficient number, since it is larger than the sum of its proper divisors (7923).

12513997 is an equidigital number, since it uses as much as digits as its factorization.

12513997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922.

The product of its digits is 17010, while the sum is 37.

The square root of 12513997 is about 3537.5128268319. The cubic root of 12513997 is about 232.1660337931.

The spelling of 12513997 in words is "twelve million, five hundred thirteen thousand, nine hundred ninety-seven".