161037899 has 8 divisors (see below), whose sum is σ = 181735920. Its totient is φ = 141349600.

The previous prime is 161037871. The next prime is 161037911. The reversal of 161037899 is 998730161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161037899 - 2¹⁶ = 160972363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161037829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252092 + ... + 252729.

It is an arithmetic number, because the mean of its divisors is an integer number (22716990).

Almost surely, 2^161037899 is an apocalyptic number.

161037899 is a deficient number, since it is larger than the sum of its proper divisors (20698021).

161037899 is a wasteful number, since it uses less digits than its factorization.

161037899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504861.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 161037899 is about 12690.0708823867. The cubic root of 161037899 is about 544.0548655646.

The spelling of 161037899 in words is "one hundred sixty-one million, thirty-seven thousand, eight hundred ninety-nine".