99999875 has 8 divisors (see below), whose sum is σ = 124800000. Its totient is φ = 79999800.

The previous prime is 99999847. The next prime is 99999931. The reversal of 99999875 is 57899999.

It is not a de Polignac number, because 99999875 - 2¹⁰ = 99998851 is a prime.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399875 + ... + 400124.

It is an arithmetic number, because the mean of its divisors is an integer number (15600000).

Almost surely, 2^99999875 is an apocalyptic number.

99999875 is a deficient number, since it is larger than the sum of its proper divisors (24800125).

99999875 is an equidigital number, since it uses as much as digits as its factorization.

99999875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800014 (or 800004 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 65.

The square root of 99999875 is about 9999.9937499980. The cubic root of 99999875 is about 464.1586899617.

The spelling of 99999875 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred seventy-five".