989664263 has 8 divisors (see below), whose sum is σ = 1180220928. Its totient is φ = 811401624.

The previous prime is 989664251. The next prime is 989664281. The reversal of 989664263 is 362466989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989664263 - 2⁶ = 989664199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989664233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3073331 + ... + 3073652.

It is an arithmetic number, because the mean of its divisors is an integer number (147527616).

Almost surely, 2^989664263 is an apocalyptic number.

989664263 is a deficient number, since it is larger than the sum of its proper divisors (190556665).

989664263 is a wasteful number, since it uses less digits than its factorization.

989664263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147013.

The product of its digits is 3359232, while the sum is 53.

The square root of 989664263 is about 31458.9297815422. The cubic root of 989664263 is about 996.5428159856.

The spelling of 989664263 in words is "nine hundred eighty-nine million, six hundred sixty-four thousand, two hundred sixty-three".