15339989 has 10 divisors (see below), whose sum is σ = 17898390. Its totient is φ = 13146504.

The previous prime is 15339971. The next prime is 15340007. The reversal of 15339989 is 98993351.

15339989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15339971) and next prime (15340007).

It can be written as a sum of positive squares in only one way, i.e., 8076964 + 7263025 = 2842^2 + 2695^2 .

It is not a de Polignac number, because 15339989 - 2¹⁶ = 15274453 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 (15339959) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 794 + ... + 5595.

It is an arithmetic number, because the mean of its divisors is an integer number (1789839).

Almost surely, 2^15339989 is an apocalyptic number.

It is an amenable number.

15339989 is a deficient number, since it is larger than the sum of its proper divisors (2558401).

15339989 is an frugal number, since it uses more digits than its factorization.

15339989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417 (or 6396 counting only the distinct ones).

The product of its digits is 262440, while the sum is 47.

The square root of 15339989 is about 3916.6298012449. The cubic root of 15339989 is about 248.4706042065.

The spelling of 15339989 in words is "fifteen million, three hundred thirty-nine thousand, nine hundred eighty-nine".