1345797787 has 2 divisors, whose sum is σ = 1345797788. Its totient is φ = 1345797786.

The previous prime is 1345797779. The next prime is 1345797833. The reversal of 1345797787 is 7877975431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1345797787 - 2³ = 1345797779 is a prime.

It is a super-2 number, since 2×1345797787² = 3622343366988194738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1345797587) 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, 672898893 + 672898894.

It is an arithmetic number, because the mean of its divisors is an integer number (672898894).

Almost surely, 2^1345797787 is an apocalyptic number.

1345797787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345797787 is an equidigital number, since it uses as much as digits as its factorization.

1345797787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10372320, while the sum is 58.

The square root of 1345797787 is about 36685.1166960117. The cubic root of 1345797787 is about 1104.0615106433.

The spelling of 1345797787 in words is "one billion, three hundred forty-five million, seven hundred ninety-seven thousand, seven hundred eighty-seven".