9157009 has 4 divisors (see below), whose sum is σ = 9246016. Its totient is φ = 9068004.

The previous prime is 9157007. The next prime is 9157021. The reversal of 9157009 is 9007519.

9157009 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, and also an emirpimes, since its reverse is a distinct semiprime: 9007519 = 443 ⋅20333.

It is a cyclic number.

It is not a de Polignac number, because 9157009 - 2¹ = 9157007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9157003) 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, 44349 + ... + 44554.

It is an arithmetic number, because the mean of its divisors is an integer number (2311504).

Almost surely, 2^9157009 is an apocalyptic number.

It is an amenable number.

9157009 is a deficient number, since it is larger than the sum of its proper divisors (89007).

9157009 is a wasteful number, since it uses less digits than its factorization.

9157009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89006.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 9157009 is about 3026.0550226326. The cubic root of 9157009 is about 209.2110152538.

The spelling of 9157009 in words is "nine million, one hundred fifty-seven thousand, nine".