231339709 has 2 divisors, whose sum is σ = 231339710. Its totient is φ = 231339708.

The previous prime is 231339673. The next prime is 231339733. The reversal of 231339709 is 907933132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176624100 + 54715609 = 13290^2 + 7397^2 .

It is a cyclic number.

It is not a de Polignac number, because 231339709 - 2⁹ = 231339197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231339769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115669854 + 115669855.

It is an arithmetic number, because the mean of its divisors is an integer number (115669855).

Almost surely, 2^231339709 is an apocalyptic number.

It is an amenable number.

231339709 is a deficient number, since it is larger than the sum of its proper divisors (1).

231339709 is an equidigital number, since it uses as much as digits as its factorization.

231339709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 231339709 is about 15209.8556534899. The cubic root of 231339709 is about 613.8798735451.

The spelling of 231339709 in words is "two hundred thirty-one million, three hundred thirty-nine thousand, seven hundred nine".