1345516409 has 2 divisors, whose sum is σ = 1345516410. Its totient is φ = 1345516408.

The previous prime is 1345516301. The next prime is 1345516481. The reversal of 1345516409 is 9046155431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1299818809 + 45697600 = 36053^2 + 6760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345516409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345516489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672758204 + 672758205.

It is an arithmetic number, because the mean of its divisors is an integer number (672758205).

Almost surely, 2^1345516409 is an apocalyptic number.

It is an amenable number.

1345516409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345516409 is an equidigital number, since it uses as much as digits as its factorization.

1345516409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1345516409 is about 36681.2814525338. The cubic root of 1345516409 is about 1103.9845599364.

The spelling of 1345516409 in words is "one billion, three hundred forty-five million, five hundred sixteen thousand, four hundred nine".