99801137 has 4 divisors (see below), whose sum is σ = 99927156. Its totient is φ = 99675120.

The previous prime is 99801131. The next prime is 99801139. The reversal of 99801137 is 73110899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55591936 + 44209201 = 7456^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 99801137 - 2⁶ = 99801073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99801137.

It is not an unprimeable number, because it can be changed into a prime (99801131) 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, 61814 + ... + 63407.

It is an arithmetic number, because the mean of its divisors is an integer number (24981789).

Almost surely, 2^99801137 is an apocalyptic number.

It is an amenable number.

99801137 is a deficient number, since it is larger than the sum of its proper divisors (126019).

99801137 is a wasteful number, since it uses less digits than its factorization.

99801137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126018.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 99801137 is about 9990.0519017671. The cubic root of 99801137 is about 463.8509990883.

The spelling of 99801137 in words is "ninety-nine million, eight hundred one thousand, one hundred thirty-seven".