230717509 has 4 divisors (see below), whose sum is σ = 251691840. Its totient is φ = 209743180.

The previous prime is 230717503. The next prime is 230717521. The reversal of 230717509 is 905717032.

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 a cyclic number.

It is not a de Polignac number, because 230717509 - 2²⁵ = 197163077 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 (230717503) 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, 10487149 + ... + 10487170.

It is an arithmetic number, because the mean of its divisors is an integer number (62922960).

Almost surely, 2^230717509 is an apocalyptic number.

It is an amenable number.

230717509 is a deficient number, since it is larger than the sum of its proper divisors (20974331).

230717509 is a wasteful number, since it uses less digits than its factorization.

230717509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20974330.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 230717509 is about 15189.3880390225. The cubic root of 230717509 is about 613.3290256143.

The spelling of 230717509 in words is "two hundred thirty million, seven hundred seventeen thousand, five hundred nine".