13597989 has 4 divisors (see below), whose sum is σ = 18130656. Its totient is φ = 9065324.

The previous prime is 13597963. The next prime is 13598009. The reversal of 13597989 is 98979531.

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 not a de Polignac number, because 13597989 - 2⁷ = 13597861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13597919) 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, 2266329 + ... + 2266334.

It is an arithmetic number, because the mean of its divisors is an integer number (4532664).

Almost surely, 2^13597989 is an apocalyptic number.

It is an amenable number.

13597989 is a deficient number, since it is larger than the sum of its proper divisors (4532667).

13597989 is an equidigital number, since it uses as much as digits as its factorization.

13597989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532666.

The product of its digits is 612360, while the sum is 51.

The square root of 13597989 is about 3687.5451183680. The cubic root of 13597989 is about 238.6848726354.

The spelling of 13597989 in words is "thirteen million, five hundred ninety-seven thousand, nine hundred eighty-nine".