99531161 has 4 divisors (see below), whose sum is σ = 102963300. Its totient is φ = 96099024.

The previous prime is 99531127. The next prime is 99531163. The reversal of 99531161 is 16113599.

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 60155536 + 39375625 = 7756^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 99531161 - 2¹⁴ = 99514777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99531163) 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, 1716026 + ... + 1716083.

It is an arithmetic number, because the mean of its divisors is an integer number (25740825).

Almost surely, 2^99531161 is an apocalyptic number.

It is an amenable number.

99531161 is a deficient number, since it is larger than the sum of its proper divisors (3432139).

99531161 is a wasteful number, since it uses less digits than its factorization.

99531161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432138.

The product of its digits is 7290, while the sum is 35.

The square root of 99531161 is about 9976.5305091500. The cubic root of 99531161 is about 463.4323608128.

The spelling of 99531161 in words is "ninety-nine million, five hundred thirty-one thousand, one hundred sixty-one".