989659231 has 4 divisors (see below), whose sum is σ = 1079628264. Its totient is φ = 899690200.

The previous prime is 989659163. The next prime is 989659241. The reversal of 989659231 is 132956989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 989659231 - 2⁷ = 989659103 is a prime.

It is a super-2 number, since 2×989659231² = 1958850787007022722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989659241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44984500 + ... + 44984521.

It is an arithmetic number, because the mean of its divisors is an integer number (269907066).

Almost surely, 2^989659231 is an apocalyptic number.

989659231 is a deficient number, since it is larger than the sum of its proper divisors (89969033).

989659231 is a wasteful number, since it uses less digits than its factorization.

989659231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89969032.

The product of its digits is 1049760, while the sum is 52.

The square root of 989659231 is about 31458.8498041489. The cubic root of 989659231 is about 996.5411269913.

The spelling of 989659231 in words is "nine hundred eighty-nine million, six hundred fifty-nine thousand, two hundred thirty-one".