311403023 has 2 divisors, whose sum is σ = 311403024. Its totient is φ = 311403022.

The previous prime is 311403019. The next prime is 311403067. The reversal of 311403023 is 320304113.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (320304113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311403023 - 2² = 311403019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311402992 and 311403010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311403083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155701511 + 155701512.

It is an arithmetic number, because the mean of its divisors is an integer number (155701512).

Almost surely, 2^311403023 is an apocalyptic number.

311403023 is a deficient number, since it is larger than the sum of its proper divisors (1).

311403023 is an equidigital number, since it uses as much as digits as its factorization.

311403023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 311403023 is about 17646.6150578517. The cubic root of 311403023 is about 677.8094322332.

Adding to 311403023 its reverse (320304113), we get a palindrome (631707136).

The spelling of 311403023 in words is "three hundred eleven million, four hundred three thousand, twenty-three".