1346816609 has 2 divisors, whose sum is σ = 1346816610. Its totient is φ = 1346816608.

The previous prime is 1346816593. The next prime is 1346816617. The reversal of 1346816609 is 9066186431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338096400 + 8720209 = 36580^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1346816609 - 2⁴ = 1346816593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1346816609.

It is not a weakly prime, because it can be changed into another prime (1346816629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673408304 + 673408305.

It is an arithmetic number, because the mean of its divisors is an integer number (673408305).

Almost surely, 2^1346816609 is an apocalyptic number.

It is an amenable number.

1346816609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346816609 is an equidigital number, since it uses as much as digits as its factorization.

1346816609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1346816609 is about 36699.0001089948. Note that the first 3 decimals coincide. The cubic root of 1346816609 is about 1104.3400464027.

The spelling of 1346816609 in words is "one billion, three hundred forty-six million, eight hundred sixteen thousand, six hundred nine".