239234112581 has 2 divisors, whose sum is σ = 239234112582. Its totient is φ = 239234112580.

The previous prime is 239234112541. The next prime is 239234112583. The reversal of 239234112581 is 185211432932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202688143681 + 36545968900 = 450209^2 + 191170^2 .

It is a cyclic number.

It is not a de Polignac number, because 239234112581 - 2¹⁸ = 239233850437 is a prime.

It is a super-2 number, since 2×239234112581² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 239234112583, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239234112583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119617056290 + 119617056291.

It is an arithmetic number, because the mean of its divisors is an integer number (119617056291).

Almost surely, 2^239234112581 is an apocalyptic number.

It is an amenable number.

239234112581 is a deficient number, since it is larger than the sum of its proper divisors (1).

239234112581 is an equidigital number, since it uses as much as digits as its factorization.

239234112581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The spelling of 239234112581 in words is "two hundred thirty-nine billion, two hundred thirty-four million, one hundred twelve thousand, five hundred eighty-one".