99157 has 4 divisors (see below), whose sum is σ = 99820. Its totient is φ = 98496.

The previous prime is 99149. The next prime is 99173. The reversal of 99157 is 75199.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75199 = 139 ⋅541.

It can be written as a sum of positive squares in 2 ways, for example, as 53361 + 45796 = 231^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 99157 - 2³ = 99149 is a prime.

It is a super-2 number, since 2×99157² = 19664221298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (24955).

2⁹⁹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

99157 is a deficient number, since it is larger than the sum of its proper divisors (663).

99157 is a wasteful number, since it uses less digits than its factorization.

99157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its digits is 2835, while the sum is 31.

The square root of 99157 is about 314.8920449932. The cubic root of 99157 is about 46.2850914592.

It can be divided in two parts, 99 and 157, that added together give a 8-th power (256 = 2⁸).

The spelling of 99157 in words is "ninety-nine thousand, one hundred fifty-seven".