1345165391 has 2 divisors, whose sum is σ = 1345165392. Its totient is φ = 1345165390.

The previous prime is 1345165357. The next prime is 1345165397. The reversal of 1345165391 is 1935615431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345165391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345165397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672582695 + 672582696.

It is an arithmetic number, because the mean of its divisors is an integer number (672582696).

Almost surely, 2^1345165391 is an apocalyptic number.

1345165391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345165391 is an equidigital number, since it uses as much as digits as its factorization.

1345165391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 1345165391 is about 36676.4964384550. The cubic root of 1345165391 is about 1103.8885491773. Note that the first 3 decimals are identical.

The spelling of 1345165391 in words is "one billion, three hundred forty-five million, one hundred sixty-five thousand, three hundred ninety-one".