13609997 has 4 divisors (see below), whose sum is σ = 14201760. Its totient is φ = 13018236.

The previous prime is 13609963. The next prime is 13610021. The reversal of 13609997 is 79990631.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13609997 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 (13609927) 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, 295847 + ... + 295892.

It is an arithmetic number, because the mean of its divisors is an integer number (3550440).

Almost surely, 2^13609997 is an apocalyptic number.

It is an amenable number.

13609997 is a deficient number, since it is larger than the sum of its proper divisors (591763).

13609997 is an equidigital number, since it uses as much as digits as its factorization.

13609997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591762.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 13609997 is about 3689.1729425442. The cubic root of 13609997 is about 238.7551105875.

The spelling of 13609997 in words is "thirteen million, six hundred nine thousand, nine hundred ninety-seven".