231606709 has 4 divisors (see below), whose sum is σ = 231777504. Its totient is φ = 231435916.

The previous prime is 231606689. The next prime is 231606719. The reversal of 231606709 is 907606132.

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 231606709 - 2⁵ = 231606677 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 (231606719) 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, 83347 + ... + 86080.

It is an arithmetic number, because the mean of its divisors is an integer number (57944376).

Almost surely, 2^231606709 is an apocalyptic number.

It is an amenable number.

231606709 is a deficient number, since it is larger than the sum of its proper divisors (170795).

231606709 is a wasteful number, since it uses less digits than its factorization.

231606709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170794.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 231606709 is about 15218.6303260182. The cubic root of 231606709 is about 614.1159519226.

The spelling of 231606709 in words is "two hundred thirty-one million, six hundred six thousand, seven hundred nine".