231005839 has 2 divisors, whose sum is σ = 231005840. Its totient is φ = 231005838.

The previous prime is 231005807. The next prime is 231005861. The reversal of 231005839 is 938500132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231005839 - 2⁵ = 231005807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231005839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231005899) 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, 115502919 + 115502920.

It is an arithmetic number, because the mean of its divisors is an integer number (115502920).

Almost surely, 2^231005839 is an apocalyptic number.

231005839 is a deficient number, since it is larger than the sum of its proper divisors (1).

231005839 is an equidigital number, since it uses as much as digits as its factorization.

231005839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 231005839 is about 15198.8762413542. The cubic root of 231005839 is about 613.5844137483.

The spelling of 231005839 in words is "two hundred thirty-one million, five thousand, eight hundred thirty-nine".