989323291 has 4 divisors (see below), whose sum is σ = 1079261784. Its totient is φ = 899384800.

The previous prime is 989323289. The next prime is 989323303. The reversal of 989323291 is 192323989.

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 989323291 - 2¹ = 989323289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989323261) 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, 44969230 + ... + 44969251.

It is an arithmetic number, because the mean of its divisors is an integer number (269815446).

Almost surely, 2^989323291 is an apocalyptic number.

989323291 is a deficient number, since it is larger than the sum of its proper divisors (89938493).

989323291 is a wasteful number, since it uses less digits than its factorization.

989323291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89938492.

The product of its digits is 209952, while the sum is 46.

The square root of 989323291 is about 31453.5099949115. The cubic root of 989323291 is about 996.4283555433.

The spelling of 989323291 in words is "nine hundred eighty-nine million, three hundred twenty-three thousand, two hundred ninety-one".