161529899 has 8 divisors (see below), whose sum is σ = 164166912. Its totient is φ = 158903080.

The previous prime is 161529883. The next prime is 161529911. The reversal of 161529899 is 998925161.

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 161529899 - 2⁴ = 161529883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161529859) 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, 33452 + ... + 37974.

It is an arithmetic number, because the mean of its divisors is an integer number (20520864).

Almost surely, 2^161529899 is an apocalyptic number.

161529899 is a deficient number, since it is larger than the sum of its proper divisors (2637013).

161529899 is an equidigital number, since it uses as much as digits as its factorization.

161529899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097.

The product of its digits is 349920, while the sum is 50.

The square root of 161529899 is about 12709.4413331192. The cubic root of 161529899 is about 544.6083643759.

The spelling of 161529899 in words is "one hundred sixty-one million, five hundred twenty-nine thousand, eight hundred ninety-nine".