83928999 has 16 divisors (see below), whose sum is σ = 139518720. Its totient is φ = 43599360.

The previous prime is 83928989. The next prime is 83929007. The reversal of 83928999 is 99982938.

It is not a de Polignac number, because 83928999 - 2⁹ = 83928487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83928919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181434 + ... + 181895.

It is an arithmetic number, because the mean of its divisors is an integer number (8719920).

Almost surely, 2^83928999 is an apocalyptic number.

83928999 is a deficient number, since it is larger than the sum of its proper divisors (55589721).

83928999 is a wasteful number, since it uses less digits than its factorization.

83928999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363350.

The product of its digits is 2519424, while the sum is 57.

The square root of 83928999 is about 9161.2771489569. The cubic root of 83928999 is about 437.8284862547.

It can be divided in two parts, 8392 and 8999, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 83928999 in words is "eighty-three million, nine hundred twenty-eight thousand, nine hundred ninety-nine".