231042787 has 2 divisors, whose sum is σ = 231042788. Its totient is φ = 231042786.

The previous prime is 231042769. The next prime is 231042803. The reversal of 231042787 is 787240132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231042787 - 2¹¹ = 231040739 is a prime.

It is not a weakly prime, because it can be changed into another prime (231042187) 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, 115521393 + 115521394.

It is an arithmetic number, because the mean of its divisors is an integer number (115521394).

Almost surely, 2^231042787 is an apocalyptic number.

231042787 is a deficient number, since it is larger than the sum of its proper divisors (1).

231042787 is an equidigital number, since it uses as much as digits as its factorization.

231042787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 231042787 is about 15200.0916773551. The cubic root of 231042787 is about 613.6171250547.

The spelling of 231042787 in words is "two hundred thirty-one million, forty-two thousand, seven hundred eighty-seven".