999397575 has 96 divisors (see below), whose sum is σ = 2014156800. Its totient is φ = 481824000.

The previous prime is 999397573. The next prime is 999397579. The reversal of 999397575 is 575793999.

It is not a de Polignac number, because 999397575 - 2¹ = 999397573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999397573) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2086186 + ... + 2086664.

It is an arithmetic number, because the mean of its divisors is an integer number (20980800).

Almost surely, 2^999397575 is an apocalyptic number.

999397575 is the 15807-th decagonal number.

999397575 is an abundant number, since it is smaller than the sum of its proper divisors (1014759225).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999397575 is a wasteful number, since it uses less digits than its factorization.

999397575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 779 counting only the distinct ones).

The product of its digits is 24111675, while the sum is 63.

The square root of 999397575 is about 31613.2499911034. The cubic root of 999397575 is about 999.7991513292.

The spelling of 999397575 in words is "nine hundred ninety-nine million, three hundred ninety-seven thousand, five hundred seventy-five".