1344623909 has 2 divisors, whose sum is σ = 1344623910. Its totient is φ = 1344623908.

The previous prime is 1344623897. The next prime is 1344623923. The reversal of 1344623909 is 9093264431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939729025 + 404894884 = 30655^2 + 20122^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344623909 - 2²⁰ = 1343575333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344623009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672311954 + 672311955.

It is an arithmetic number, because the mean of its divisors is an integer number (672311955).

Almost surely, 2^1344623909 is an apocalyptic number.

It is an amenable number.

1344623909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344623909 is an equidigital number, since it uses as much as digits as its factorization.

1344623909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 1344623909 is about 36669.1138289433. The cubic root of 1344623909 is about 1103.7404097724.

The spelling of 1344623909 in words is "one billion, three hundred forty-four million, six hundred twenty-three thousand, nine hundred nine".