8173989 has 6 divisors (see below), whose sum is σ = 11806886. Its totient is φ = 5449320.

The previous prime is 8173951. The next prime is 8174011. The reversal of 8173989 is 9893718.

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 1361889 = 2610^2 + 1167^2 .

It is not a de Polignac number, because 8173989 - 2⁷ = 8173861 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 (8173489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454102 + ... + 454119.

Almost surely, 2^8173989 is an apocalyptic number.

It is an amenable number.

8173989 is a deficient number, since it is larger than the sum of its proper divisors (3632897).

8173989 is a wasteful number, since it uses less digits than its factorization.

8173989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908227 (or 908224 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 8173989 is about 2859.0188876606. The cubic root of 8173989 is about 201.4395223519.

The spelling of 8173989 in words is "eight million, one hundred seventy-three thousand, nine hundred eighty-nine".