1345738813 has 2 divisors, whose sum is σ = 1345738814. Its totient is φ = 1345738812.

The previous prime is 1345738787. The next prime is 1345738837. The reversal of 1345738813 is 3188375431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870368004 + 475370809 = 29502^2 + 21803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345738813 - 2²¹ = 1343641661 is a prime.

It is a super-2 number, since 2×1345738813² = 3622025905629297938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1345738813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345738913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672869406 + 672869407.

It is an arithmetic number, because the mean of its divisors is an integer number (672869407).

Almost surely, 2^1345738813 is an apocalyptic number.

It is an amenable number.

1345738813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345738813 is an equidigital number, since it uses as much as digits as its factorization.

1345738813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 1345738813 is about 36684.3129007482. The cubic root of 1345738813 is about 1104.0453834372.

The spelling of 1345738813 in words is "one billion, three hundred forty-five million, seven hundred thirty-eight thousand, eight hundred thirteen".