99857137 has 4 divisors (see below), whose sum is σ = 102179440. Its totient is φ = 97534836.

The previous prime is 99857129. The next prime is 99857143. The reversal of 99857137 is 73175899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73175899 = 37 ⋅1977727.

It is not a de Polignac number, because 99857137 - 2³ = 99857129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99855137) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1161087 + ... + 1161172.

It is an arithmetic number, because the mean of its divisors is an integer number (25544860).

Almost surely, 2^99857137 is an apocalyptic number.

It is an amenable number.

99857137 is a deficient number, since it is larger than the sum of its proper divisors (2322303).

99857137 is a wasteful number, since it uses less digits than its factorization.

99857137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322302.

The product of its digits is 476280, while the sum is 49.

The square root of 99857137 is about 9992.8542969464. The cubic root of 99857137 is about 463.9377409157.

The spelling of 99857137 in words is "ninety-nine million, eight hundred fifty-seven thousand, one hundred thirty-seven".