231490867 has 2 divisors, whose sum is σ = 231490868. Its totient is φ = 231490866.

The previous prime is 231490849. The next prime is 231490877. The reversal of 231490867 is 768094132.

231490867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231490867 - 2¹⁵ = 231458099 is a prime.

It is not a weakly prime, because it can be changed into another prime (231490817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115745433 + 115745434.

It is an arithmetic number, because the mean of its divisors is an integer number (115745434).

Almost surely, 2^231490867 is an apocalyptic number.

231490867 is a deficient number, since it is larger than the sum of its proper divisors (1).

231490867 is an equidigital number, since it uses as much as digits as its factorization.

231490867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 231490867 is about 15214.8239227406. The cubic root of 231490867 is about 614.0135480323.

The spelling of 231490867 in words is "two hundred thirty-one million, four hundred ninety thousand, eight hundred sixty-seven".