313242239 has 2 divisors, whose sum is σ = 313242240. Its totient is φ = 313242238.

The previous prime is 313242157. The next prime is 313242283. The reversal of 313242239 is 932242313.

It is a strong prime.

It is an emirp because it is prime and its reverse (932242313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313242239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313242299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156621119 + 156621120.

It is an arithmetic number, because the mean of its divisors is an integer number (156621120).

Almost surely, 2^313242239 is an apocalyptic number.

313242239 is a deficient number, since it is larger than the sum of its proper divisors (1).

313242239 is an equidigital number, since it uses as much as digits as its factorization.

313242239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 313242239 is about 17698.6507677845. The cubic root of 313242239 is about 679.1412451088.

The spelling of 313242239 in words is "three hundred thirteen million, two hundred forty-two thousand, two hundred thirty-nine".