231607009 has 2 divisors, whose sum is σ = 231607010. Its totient is φ = 231607008.

The previous prime is 231607003. The next prime is 231607043. The reversal of 231607009 is 900706132.

231607009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231040000 + 567009 = 15200^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 231607009 - 2³ = 231607001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231607001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115803504 + 115803505.

It is an arithmetic number, because the mean of its divisors is an integer number (115803505).

Almost surely, 2^231607009 is an apocalyptic number.

It is an amenable number.

231607009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231607009 is an equidigital number, since it uses as much as digits as its factorization.

231607009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 231607009 is about 15218.6401823553. The cubic root of 231607009 is about 614.1162170771.

The spelling of 231607009 in words is "two hundred thirty-one million, six hundred seven thousand, nine".