13479989 has 4 divisors (see below), whose sum is σ = 13669920. Its totient is φ = 13290060.

The previous prime is 13479979. The next prime is 13480003. The reversal of 13479989 is 98997431.

13479989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 98997431 = 13 ⋅7615187.

It is a cyclic number.

It is not a de Polignac number, because 13479989 - 2¹² = 13475893 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 (13479979) 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, 94859 + ... + 95000.

It is an arithmetic number, because the mean of its divisors is an integer number (3417480).

Almost surely, 2^13479989 is an apocalyptic number.

It is an amenable number.

13479989 is a deficient number, since it is larger than the sum of its proper divisors (189931).

13479989 is an equidigital number, since it uses as much as digits as its factorization.

13479989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189930.

The product of its digits is 489888, while the sum is 50.

The square root of 13479989 is about 3671.5104521164. The cubic root of 13479989 is about 237.9924496816.

The spelling of 13479989 in words is "thirteen million, four hundred seventy-nine thousand, nine hundred eighty-nine".