9172513 has 4 divisors (see below), whose sum is σ = 10482880. Its totient is φ = 7862148.

The previous prime is 9172483. The next prime is 9172531. The reversal of 9172513 is 3152719.

9172513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9172513 - 2⁵ = 9172481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9172913) 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, 655173 + ... + 655186.

It is an arithmetic number, because the mean of its divisors is an integer number (2620720).

Almost surely, 2^9172513 is an apocalyptic number.

It is an amenable number.

9172513 is a deficient number, since it is larger than the sum of its proper divisors (1310367).

9172513 is a wasteful number, since it uses less digits than its factorization.

9172513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310366.

The product of its digits is 1890, while the sum is 28.

The square root of 9172513 is about 3028.6156903774. The cubic root of 9172513 is about 209.3290224431.

The spelling of 9172513 in words is "nine million, one hundred seventy-two thousand, five hundred thirteen".