15243389 has 4 divisors (see below), whose sum is σ = 17421024. Its totient is φ = 13065756.

The previous prime is 15243379. The next prime is 15243401. The reversal of 15243389 is 98334251.

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: 98334251 = 911 ⋅107941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15243389 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 (15243359) 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, 1088807 + ... + 1088820.

It is an arithmetic number, because the mean of its divisors is an integer number (4355256).

Almost surely, 2^15243389 is an apocalyptic number.

It is an amenable number.

15243389 is a deficient number, since it is larger than the sum of its proper divisors (2177635).

15243389 is an equidigital number, since it uses as much as digits as its factorization.

15243389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177634.

The product of its digits is 25920, while the sum is 35.

The square root of 15243389 is about 3904.2782943843. The cubic root of 15243389 is about 247.9479436785.

It can be divided in two parts, 1524 and 3389, that added together give a cube (4913 = 17³).

The spelling of 15243389 in words is "fifteen million, two hundred forty-three thousand, three hundred eighty-nine".