161140099 has 4 divisors (see below), whose sum is σ = 161183736. Its totient is φ = 161096464.

The previous prime is 161140097. The next prime is 161140117. The reversal of 161140099 is 990041161.

161140099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990041161 = 11497 ⋅86113.

It is a cyclic number.

It is not a de Polignac number, because 161140099 - 2¹ = 161140097 is a prime.

It is a super-2 number, since 2×161140099² = 51932263011459602, which contains 22 as substring.

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 161140099.

It is not an unprimeable number, because it can be changed into a prime (161140097) 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, 15709 + ... + 23854.

It is an arithmetic number, because the mean of its divisors is an integer number (40295934).

Almost surely, 2^161140099 is an apocalyptic number.

161140099 is a deficient number, since it is larger than the sum of its proper divisors (43637).

161140099 is an equidigital number, since it uses as much as digits as its factorization.

161140099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43636.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 161140099 is about 12694.0970139668. The cubic root of 161140099 is about 544.1699329894.

The spelling of 161140099 in words is "one hundred sixty-one million, one hundred forty thousand, ninety-nine".