999899375 has 10 divisors (see below), whose sum is σ = 1249475040. Its totient is φ = 799919000.

The previous prime is 999899333. The next prime is 999899399. The reversal of 999899375 is 573998999.

It is not a de Polignac number, because 999899375 - 2⁶ = 999899311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 799295 + ... + 800544.

It is an arithmetic number, because the mean of its divisors is an integer number (124947504).

Almost surely, 2^999899375 is an apocalyptic number.

999899375 is a deficient number, since it is larger than the sum of its proper divisors (249575665).

999899375 is an equidigital number, since it uses as much as digits as its factorization.

999899375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599859 (or 1599844 counting only the distinct ones).

The product of its digits is 49601160, while the sum is 68.

The square root of 999899375 is about 31621.1855407099. The cubic root of 999899375 is about 999.9664572082.

The spelling of 999899375 in words is "nine hundred ninety-nine million, eight hundred ninety-nine thousand, three hundred seventy-five".