989165401 has 9 divisors (see below), whose sum is σ = 1150917951. Its totient is φ = 847667352.

The previous prime is 989165389. The next prime is 989165407. The reversal of 989165401 is 104561989.

The square root of 989165401 is 31451.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 985646025 + 3519376 = 31395^2 + 1876^2 .

It is not a de Polignac number, because 989165401 - 2⁵ = 989165369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989165407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 217911 + ... + 222403.

Almost surely, 2^989165401 is an apocalyptic number.

989165401 is the 31451-st square number.

989165401 is the 15726-th centered octagonal number.

It is an amenable number.

989165401 is a deficient number, since it is larger than the sum of its proper divisors (161752550).

989165401 is an frugal number, since it uses more digits than its factorization.

989165401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000 (or 4500 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The cubic root of 989165401 is about 996.3753447480.

The spelling of 989165401 in words is "nine hundred eighty-nine million, one hundred sixty-five thousand, four hundred one".