311134661 has 2 divisors, whose sum is σ = 311134662. Its totient is φ = 311134660.

The previous prime is 311134657. The next prime is 311134669. The reversal of 311134661 is 166431113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308669761 + 2464900 = 17569^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 311134661 - 2² = 311134657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311134661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311134669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155567330 + 155567331.

It is an arithmetic number, because the mean of its divisors is an integer number (155567331).

Almost surely, 2^311134661 is an apocalyptic number.

It is an amenable number.

311134661 is a deficient number, since it is larger than the sum of its proper divisors (1).

311134661 is an equidigital number, since it uses as much as digits as its factorization.

311134661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 311134661 is about 17639.0096377319. The cubic root of 311134661 is about 677.6146679366.

Adding to 311134661 its reverse (166431113), we get a palindrome (477565774).

The spelling of 311134661 in words is "three hundred eleven million, one hundred thirty-four thousand, six hundred sixty-one".