161930089 has 4 divisors (see below), whose sum is σ = 164347024. Its totient is φ = 159513156.

The previous prime is 161930077. The next prime is 161930099. The reversal of 161930089 is 980039161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161930089 - 2¹⁵ = 161897321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161930039) 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, 1208367 + ... + 1208500.

It is an arithmetic number, because the mean of its divisors is an integer number (41086756).

Almost surely, 2^161930089 is an apocalyptic number.

It is an amenable number.

161930089 is a deficient number, since it is larger than the sum of its proper divisors (2416935).

161930089 is an equidigital number, since it uses as much as digits as its factorization.

161930089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416934.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 161930089 is about 12725.1754015416. The cubic root of 161930089 is about 545.0577488395.

The spelling of 161930089 in words is "one hundred sixty-one million, nine hundred thirty thousand, eighty-nine".