313287391 has 2 divisors, whose sum is σ = 313287392. Its totient is φ = 313287390.

The previous prime is 313287361. The next prime is 313287421. The reversal of 313287391 is 193782313.

It is a balanced prime because it is at equal distance from previous prime (313287361) and next prime (313287421).

It is an emirp because it is prime and its reverse (193782313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313287391 - 2⁷ = 313287263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313287391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313287361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156643695 + 156643696.

It is an arithmetic number, because the mean of its divisors is an integer number (156643696).

Almost surely, 2^313287391 is an apocalyptic number.

313287391 is a deficient number, since it is larger than the sum of its proper divisors (1).

313287391 is an equidigital number, since it uses as much as digits as its factorization.

313287391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 313287391 is about 17699.9262992816. The cubic root of 313287391 is about 679.1738749274.

The spelling of 313287391 in words is "three hundred thirteen million, two hundred eighty-seven thousand, three hundred ninety-one".