915983 has 4 divisors (see below), whose sum is σ = 935520. Its totient is φ = 896448.

The previous prime is 915973. The next prime is 915991. The reversal of 915983 is 389519.

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

It is a cyclic number.

It is not a de Polignac number, because 915983 - 2⁶ = 915919 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 (915973) 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, 9698 + ... + 9791.

It is an arithmetic number, because the mean of its divisors is an integer number (233880).

2⁹¹⁵⁹⁸³ is an apocalyptic number.

915983 is a deficient number, since it is larger than the sum of its proper divisors (19537).

915983 is a wasteful number, since it uses less digits than its factorization.

915983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19536.

The product of its digits is 9720, while the sum is 35.

The square root of 915983 is about 957.0700078887. The cubic root of 915983 is about 97.1171221374.

The spelling of 915983 in words is "nine hundred fifteen thousand, nine hundred eighty-three".