311513393 has 2 divisors, whose sum is σ = 311513394. Its totient is φ = 311513392.

The previous prime is 311513329. The next prime is 311513399. The reversal of 311513393 is 393315113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241087729 + 70425664 = 15527^2 + 8392^2 .

It is a cyclic number.

It is not a de Polignac number, because 311513393 - 2⁶ = 311513329 is a prime.

It is not a weakly prime, because it can be changed into another prime (311513399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155756696 + 155756697.

It is an arithmetic number, because the mean of its divisors is an integer number (155756697).

Almost surely, 2^311513393 is an apocalyptic number.

It is an amenable number.

311513393 is a deficient number, since it is larger than the sum of its proper divisors (1).

311513393 is an equidigital number, since it uses as much as digits as its factorization.

311513393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645, while the sum is 29.

The square root of 311513393 is about 17649.7420094459. The cubic root of 311513393 is about 677.8895010240.

The spelling of 311513393 in words is "three hundred eleven million, five hundred thirteen thousand, three hundred ninety-three".