989027231 has 4 divisors (see below), whose sum is σ = 1002957264. Its totient is φ = 975097200.

The previous prime is 989027227. The next prime is 989027243. The reversal of 989027231 is 132720989.

It is a happy number.

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 989027231 - 2² = 989027227 is a prime.

It is a super-2 number, since 2×989027231² = 1956349727319054722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989027201) 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, 6964910 + ... + 6965051.

It is an arithmetic number, because the mean of its divisors is an integer number (250739316).

Almost surely, 2^989027231 is an apocalyptic number.

989027231 is a deficient number, since it is larger than the sum of its proper divisors (13930033).

989027231 is a wasteful number, since it uses less digits than its factorization.

989027231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930032.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 989027231 is about 31448.8033317645. The cubic root of 989027231 is about 996.3289502179.

The spelling of 989027231 in words is "nine hundred eighty-nine million, twenty-seven thousand, two hundred thirty-one".