239998939 has 2 divisors, whose sum is σ = 239998940. Its totient is φ = 239998938.

The previous prime is 239998903. The next prime is 239998963. The reversal of 239998939 is 939899932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239998939 - 2¹¹ = 239996891 is a prime.

It is a super-2 number, since 2×239998939² = 115198981442251442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (239998439) 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, 119999469 + 119999470.

It is an arithmetic number, because the mean of its divisors is an integer number (119999470).

Almost surely, 2^239998939 is an apocalyptic number.

239998939 is a deficient number, since it is larger than the sum of its proper divisors (1).

239998939 is an equidigital number, since it uses as much as digits as its factorization.

239998939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8503056, while the sum is 61.

The square root of 239998939 is about 15491.8991411641. The cubic root of 239998939 is about 621.4455854190.

The spelling of 239998939 in words is "two hundred thirty-nine million, nine hundred ninety-eight thousand, nine hundred thirty-nine".