889731609 has 32 divisors (see below), whose sum is σ = 1337790720. Its totient is φ = 521883648.

The previous prime is 889731593. The next prime is 889731653. The reversal of 889731609 is 906137988.

It is not a de Polignac number, because 889731609 - 2⁴ = 889731593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (889731509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279177 + ... + 282345.

It is an arithmetic number, because the mean of its divisors is an integer number (41805960).

Almost surely, 2^889731609 is an apocalyptic number.

It is an amenable number.

889731609 is a deficient number, since it is larger than the sum of its proper divisors (448059111).

889731609 is a wasteful number, since it uses less digits than its factorization.

889731609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 889731609 is about 29828.3691977956. The cubic root of 889731609 is about 961.8034707447.

The spelling of 889731609 in words is "eight hundred eighty-nine million, seven hundred thirty-one thousand, six hundred nine".