13103989 has 4 divisors (see below), whose sum is σ = 13182624. Its totient is φ = 13025356.

The previous prime is 13103971. The next prime is 13103999. The reversal of 13103989 is 98930131.

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 an emirpimes, since its reverse is a distinct semiprime: 98930131 = 19 ⋅5206849.

It is a cyclic number.

It is not a de Polignac number, because 13103989 - 2⁷ = 13103861 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 (13103999) 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, 39067 + ... + 39400.

It is an arithmetic number, because the mean of its divisors is an integer number (3295656).

Almost surely, 2^13103989 is an apocalyptic number.

It is an amenable number.

13103989 is a deficient number, since it is larger than the sum of its proper divisors (78635).

13103989 is an equidigital number, since it uses as much as digits as its factorization.

13103989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78634.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 13103989 is about 3619.9432315991. The cubic root of 13103989 is about 235.7587607189.

The spelling of 13103989 in words is "thirteen million, one hundred three thousand, nine hundred eighty-nine".