161332589 has 4 divisors (see below), whose sum is σ = 175999200. Its totient is φ = 146665980.

The previous prime is 161332547. The next prime is 161332627. The reversal of 161332589 is 985233161.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 985233161 = 11 ⋅89566651.

It is a cyclic number.

It is not a de Polignac number, because 161332589 - 2²⁰ = 160284013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161332889) 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, 7333289 + ... + 7333310.

It is an arithmetic number, because the mean of its divisors is an integer number (43999800).

Almost surely, 2^161332589 is an apocalyptic number.

It is an amenable number.

161332589 is a deficient number, since it is larger than the sum of its proper divisors (14666611).

161332589 is a wasteful number, since it uses less digits than its factorization.

161332589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14666610.

The product of its digits is 38880, while the sum is 38.

The square root of 161332589 is about 12701.6766216118. The cubic root of 161332589 is about 544.3865262729.

The spelling of 161332589 in words is "one hundred sixty-one million, three hundred thirty-two thousand, five hundred eighty-nine".