1345191313 has 2 divisors, whose sum is σ = 1345191314. Its totient is φ = 1345191312.

The previous prime is 1345191257. The next prime is 1345191319. The reversal of 1345191313 is 3131915431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834747664 + 510443649 = 28892^2 + 22593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345191313 - 2²¹ = 1343094161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345191319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672595656 + 672595657.

It is an arithmetic number, because the mean of its divisors is an integer number (672595657).

Almost surely, 2^1345191313 is an apocalyptic number.

It is an amenable number.

1345191313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345191313 is an equidigital number, since it uses as much as digits as its factorization.

1345191313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 1345191313 is about 36676.8498238330. The cubic root of 1345191313 is about 1103.8956399572.

The spelling of 1345191313 in words is "one billion, three hundred forty-five million, one hundred ninety-one thousand, three hundred thirteen".