231907089 has 4 divisors (see below), whose sum is σ = 309209456. Its totient is φ = 154604724.

The previous prime is 231907079. The next prime is 231907121. The reversal of 231907089 is 980709132.

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 231907089 - 2⁸ = 231906833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231907069) 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, 38651179 + ... + 38651184.

It is an arithmetic number, because the mean of its divisors is an integer number (77302364).

Almost surely, 2^231907089 is an apocalyptic number.

It is an amenable number.

231907089 is a deficient number, since it is larger than the sum of its proper divisors (77302367).

231907089 is an equidigital number, since it uses as much as digits as its factorization.

231907089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77302366.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 231907089 is about 15228.4959533107. The cubic root of 231907089 is about 614.3813277398.

The spelling of 231907089 in words is "two hundred thirty-one million, nine hundred seven thousand, eighty-nine".