1440423313309 has 2 divisors, whose sum is σ = 1440423313310. Its totient is φ = 1440423313308.

The previous prime is 1440423313297. The next prime is 1440423313361. The reversal of 1440423313309 is 9033133240441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 802377020025 + 638046293284 = 895755^2 + 798778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440423313309 - 2⁷ = 1440423313181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440423313369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720211656654 + 720211656655.

It is an arithmetic number, because the mean of its divisors is an integer number (720211656655).

Almost surely, 2^{1440423313309} is an apocalyptic number.

It is an amenable number.

1440423313309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440423313309 is an equidigital number, since it uses as much as digits as its factorization.

1440423313309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 1440423313309 in words is "one trillion, four hundred forty billion, four hundred twenty-three million, three hundred thirteen thousand, three hundred nine".