13993597 has 4 divisors (see below), whose sum is σ = 14003136. Its totient is φ = 13984060.

The previous prime is 13993579. The next prime is 13993607. The reversal of 13993597 is 79539931.

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 a de Polignac number, because none of the positive numbers 2^k-13993597 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 (13993517) 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, 2053 + ... + 5674.

It is an arithmetic number, because the mean of its divisors is an integer number (3500784).

Almost surely, 2^13993597 is an apocalyptic number.

It is an amenable number.

13993597 is a deficient number, since it is larger than the sum of its proper divisors (9539).

13993597 is an equidigital number, since it uses as much as digits as its factorization.

13993597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538.

The product of its digits is 229635, while the sum is 46.

The square root of 13993597 is about 3740.8016520527. The cubic root of 13993597 is about 240.9774776219.

The spelling of 13993597 in words is "thirteen million, nine hundred ninety-three thousand, five hundred ninety-seven".