9172649 has 6 divisors (see below), whose sum is σ = 9681210. Its totient is φ = 8689536.

The previous prime is 9172637. The next prime is 9172663. The reversal of 9172649 is 9462719.

9172649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5914624 + 3258025 = 2432^2 + 1805^2 .

It is not a de Polignac number, because 9172649 - 2²⁰ = 8124073 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 (9172609) 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, 12344 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (1613535).

Almost surely, 2^9172649 is an apocalyptic number.

It is an amenable number.

9172649 is a deficient number, since it is larger than the sum of its proper divisors (508561).

9172649 is a wasteful number, since it uses less digits than its factorization.

9172649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25447 (or 25428 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 9172649 is about 3028.6381427962. The cubic root of 9172649 is about 209.3300570054.

The spelling of 9172649 in words is "nine million, one hundred seventy-two thousand, six hundred forty-nine".