1311092831 has 2 divisors, whose sum is σ = 1311092832. Its totient is φ = 1311092830.

The previous prime is 1311092773. The next prime is 1311092857. The reversal of 1311092831 is 1382901131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311092831 is a prime.

It is a super-2 number, since 2×1311092831² = 3437928822999189122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311092794 and 1311092803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311032831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655546415 + 655546416.

It is an arithmetic number, because the mean of its divisors is an integer number (655546416).

Almost surely, 2^1311092831 is an apocalyptic number.

1311092831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311092831 is an equidigital number, since it uses as much as digits as its factorization.

1311092831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1311092831 is about 36209.0158800263. The cubic root of 1311092831 is about 1094.4883610169.

Adding to 1311092831 its reverse (1382901131), we get a palindrome (2693993962).

The spelling of 1311092831 in words is "one billion, three hundred eleven million, ninety-two thousand, eight hundred thirty-one".