230431391 has 2 divisors, whose sum is σ = 230431392. Its totient is φ = 230431390.

The previous prime is 230431363. The next prime is 230431417. The reversal of 230431391 is 193134032.

It is a happy number.

It is an a-pointer prime, because the next prime (230431417) can be obtained adding 230431391 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230431391 - 2²² = 226237087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 230431391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230431321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115215695 + 115215696.

It is an arithmetic number, because the mean of its divisors is an integer number (115215696).

Almost surely, 2^230431391 is an apocalyptic number.

230431391 is a deficient number, since it is larger than the sum of its proper divisors (1).

230431391 is an equidigital number, since it uses as much as digits as its factorization.

230431391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 230431391 is about 15179.9667654445. The cubic root of 230431391 is about 613.0753863396.

The spelling of 230431391 in words is "two hundred thirty million, four hundred thirty-one thousand, three hundred ninety-one".