1345651969 has 2 divisors, whose sum is σ = 1345651970. Its totient is φ = 1345651968.

The previous prime is 1345651963. The next prime is 1345651981. The reversal of 1345651969 is 9691565431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1204992369 + 140659600 = 34713^2 + 11860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345651969 is a prime.

It is a super-2 number, since 2×1345651969² = 3621558443347153922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1345651963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672825984 + 672825985.

It is an arithmetic number, because the mean of its divisors is an integer number (672825985).

Almost surely, 2^1345651969 is an apocalyptic number.

It is an amenable number.

1345651969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345651969 is an equidigital number, since it uses as much as digits as its factorization.

1345651969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 49.

The square root of 1345651969 is about 36683.1292149402. The cubic root of 1345651969 is about 1104.0216339600.

The spelling of 1345651969 in words is "one billion, three hundred forty-five million, six hundred fifty-one thousand, nine hundred sixty-nine".