1345813831 has 2 divisors, whose sum is σ = 1345813832. Its totient is φ = 1345813830.

The previous prime is 1345813801. The next prime is 1345813849. The reversal of 1345813831 is 1383185431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345813831 is a prime.

It is a super-2 number, since 2×1345813831² = 3622429735421793122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345813801) 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, 672906915 + 672906916.

It is an arithmetic number, because the mean of its divisors is an integer number (672906916).

Almost surely, 2^1345813831 is an apocalyptic number.

1345813831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345813831 is an equidigital number, since it uses as much as digits as its factorization.

1345813831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 1345813831 is about 36685.3353671464. The cubic root of 1345813831 is about 1104.0658980019.

The spelling of 1345813831 in words is "one billion, three hundred forty-five million, eight hundred thirteen thousand, eight hundred thirty-one".