15316939 has 4 divisors (see below), whose sum is σ = 16709400. Its totient is φ = 13924480.

The previous prime is 15316909. The next prime is 15316967. The reversal of 15316939 is 93961351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93961351 = 11 ⋅8541941.

It is a cyclic number.

It is not a de Polignac number, because 15316939 - 2¹³ = 15308747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15316898 and 15316907.

It is not an unprimeable number, because it can be changed into a prime (15316909) 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, 696214 + ... + 696235.

It is an arithmetic number, because the mean of its divisors is an integer number (4177350).

Almost surely, 2^15316939 is an apocalyptic number.

15316939 is a deficient number, since it is larger than the sum of its proper divisors (1392461).

15316939 is a wasteful number, since it uses less digits than its factorization.

15316939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392460.

The product of its digits is 21870, while the sum is 37.

The square root of 15316939 is about 3913.6861141384. The cubic root of 15316939 is about 248.3460904617.

The spelling of 15316939 in words is "fifteen million, three hundred sixteen thousand, nine hundred thirty-nine".