311245723 has 2 divisors, whose sum is σ = 311245724. Its totient is φ = 311245722.

The previous prime is 311245717. The next prime is 311245757. The reversal of 311245723 is 327542113.

It is a weak prime.

It is an emirp because it is prime and its reverse (327542113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311245723 - 2⁵ = 311245691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311245691 and 311245700.

It is not a weakly prime, because it can be changed into another prime (311245763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155622861 + 155622862.

It is an arithmetic number, because the mean of its divisors is an integer number (155622862).

Almost surely, 2^311245723 is an apocalyptic number.

311245723 is a deficient number, since it is larger than the sum of its proper divisors (1).

311245723 is an equidigital number, since it uses as much as digits as its factorization.

311245723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 311245723 is about 17642.1575494609. The cubic root of 311245723 is about 677.6952849993.

Adding to 311245723 its reverse (327542113), we get a palindrome (638787836).

The spelling of 311245723 in words is "three hundred eleven million, two hundred forty-five thousand, seven hundred twenty-three".