1344620309 has 2 divisors, whose sum is σ = 1344620310. Its totient is φ = 1344620308.

The previous prime is 1344620281. The next prime is 1344620311. The reversal of 1344620309 is 9030264431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207215025 + 137405284 = 34745^2 + 11722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344620309 - 2¹² = 1344616213 is a prime.

Together with 1344620311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344620209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672310154 + 672310155.

It is an arithmetic number, because the mean of its divisors is an integer number (672310155).

Almost surely, 2^1344620309 is an apocalyptic number.

It is an amenable number.

1344620309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344620309 is an equidigital number, since it uses as much as digits as its factorization.

1344620309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1344620309 is about 36669.0647412775. The cubic root of 1344620309 is about 1103.7394247463.

The spelling of 1344620309 in words is "one billion, three hundred forty-four million, six hundred twenty thousand, three hundred nine".