99858957 has 16 divisors (see below), whose sum is σ = 146399232. Its totient is φ = 60041520.

The previous prime is 99858949. The next prime is 99858959. The reversal of 99858957 is 75985899.

It is not a de Polignac number, because 99858957 - 2³ = 99858949 is a prime.

It is a super-2 number, since 2×99858957² = 19943622586255698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99858957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99858959) 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, 7723 + ... + 16104.

It is an arithmetic number, because the mean of its divisors is an integer number (9149952).

Almost surely, 2^99858957 is an apocalyptic number.

It is an amenable number.

99858957 is a deficient number, since it is larger than the sum of its proper divisors (46540275).

99858957 is a wasteful number, since it uses less digits than its factorization.

99858957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23968.

The product of its digits is 8164800, while the sum is 60.

The square root of 99858957 is about 9992.9453616039. The cubic root of 99858957 is about 463.9405594809.

The spelling of 99858957 in words is "ninety-nine million, eight hundred fifty-eight thousand, nine hundred fifty-seven".