15399039 has 4 divisors (see below), whose sum is σ = 20532056. Its totient is φ = 10266024.

The previous prime is 15399037. The next prime is 15399061. The reversal of 15399039 is 93099351.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15399039 - 2¹ = 15399037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15398988 and 15399006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15399037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2566504 + ... + 2566509.

It is an arithmetic number, because the mean of its divisors is an integer number (5133014).

Almost surely, 2^15399039 is an apocalyptic number.

15399039 is a deficient number, since it is larger than the sum of its proper divisors (5133017).

15399039 is an equidigital number, since it uses as much as digits as its factorization.

15399039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133016.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 15399039 is about 3924.1609294217. The cubic root of 15399039 is about 248.7890182306.

The spelling of 15399039 in words is "fifteen million, three hundred ninety-nine thousand, thirty-nine".