1345981583 has 2 divisors, whose sum is σ = 1345981584. Its totient is φ = 1345981582.

The previous prime is 1345981561. The next prime is 1345981631. The reversal of 1345981583 is 3851895431.

It is a weak prime.

It is an emirp because it is prime and its reverse (3851895431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1345981583 - 2⁸ = 1345981327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345981283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672990791 + 672990792.

It is an arithmetic number, because the mean of its divisors is an integer number (672990792).

Almost surely, 2^1345981583 is an apocalyptic number.

1345981583 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345981583 is an equidigital number, since it uses as much as digits as its factorization.

1345981583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 47.

The square root of 1345981583 is about 36687.6216590828. The cubic root of 1345981583 is about 1104.1117690239. Note that the first 3 decimals are identical.

The spelling of 1345981583 in words is "one billion, three hundred forty-five million, nine hundred eighty-one thousand, five hundred eighty-three".