159431089 has 4 divisors (see below), whose sum is σ = 159592960. Its totient is φ = 159269220.

The previous prime is 159431087. The next prime is 159431093. The reversal of 159431089 is 980134951.

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 159431089 - 2¹ = 159431087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159431087) 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, 79449 + ... + 81430.

It is an arithmetic number, because the mean of its divisors is an integer number (39898240).

Almost surely, 2^159431089 is an apocalyptic number.

It is an amenable number.

159431089 is a deficient number, since it is larger than the sum of its proper divisors (161871).

159431089 is an equidigital number, since it uses as much as digits as its factorization.

159431089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161870.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 159431089 is about 12626.6024329588. The cubic root of 159431089 is about 542.2393166638.

The spelling of 159431089 in words is "one hundred fifty-nine million, four hundred thirty-one thousand, eighty-nine".