1311157933 has 2 divisors, whose sum is σ = 1311157934. Its totient is φ = 1311157932.

The previous prime is 1311157931. The next prime is 1311157951. The reversal of 1311157933 is 3397511131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851355684 + 459802249 = 29178^2 + 21443^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311157933 - 2¹ = 1311157931 is a prime.

Together with 1311157931, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311157931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655578966 + 655578967.

It is an arithmetic number, because the mean of its divisors is an integer number (655578967).

Almost surely, 2^1311157933 is an apocalyptic number.

It is an amenable number.

1311157933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311157933 is an equidigital number, since it uses as much as digits as its factorization.

1311157933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 34.

The square root of 1311157933 is about 36209.9148438656. The cubic root of 1311157933 is about 1094.5064762361.

The spelling of 1311157933 in words is "one billion, three hundred eleven million, one hundred fifty-seven thousand, nine hundred thirty-three".