161122899 has 32 divisors (see below), whose sum is σ = 253110784. Its totient is φ = 89268480.

The previous prime is 161122891. The next prime is 161122919. The reversal of 161122899 is 998221161.

It is not a de Polignac number, because 161122899 - 2³ = 161122891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161122891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92652 + ... + 94374.

It is an arithmetic number, because the mean of its divisors is an integer number (7909712).

Almost surely, 2^161122899 is an apocalyptic number.

161122899 is a deficient number, since it is larger than the sum of its proper divisors (91987885).

161122899 is a wasteful number, since it uses less digits than its factorization.

161122899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its digits is 15552, while the sum is 39.

The square root of 161122899 is about 12693.4195156388. The cubic root of 161122899 is about 544.1505708403.

The spelling of 161122899 in words is "one hundred sixty-one million, one hundred twenty-two thousand, eight hundred ninety-nine".