15913983 has 4 divisors (see below), whose sum is σ = 21218648. Its totient is φ = 10609320.

The previous prime is 15913981. The next prime is 15913987. The reversal of 15913983 is 38931951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38931951 = 3 ⋅12977317.

It is not a de Polignac number, because 15913983 - 2¹ = 15913981 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 (15913981) 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, 2652328 + ... + 2652333.

It is an arithmetic number, because the mean of its divisors is an integer number (5304662).

Almost surely, 2^15913983 is an apocalyptic number.

15913983 is a deficient number, since it is larger than the sum of its proper divisors (5304665).

15913983 is an equidigital number, since it uses as much as digits as its factorization.

15913983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304664.

The product of its digits is 29160, while the sum is 39.

The square root of 15913983 is about 3989.2333850002. The cubic root of 15913983 is about 251.5318373928.

The spelling of 15913983 in words is "fifteen million, nine hundred thirteen thousand, nine hundred eighty-three".