1340744539 has 2 divisors, whose sum is σ = 1340744540. Its totient is φ = 1340744538.

The previous prime is 1340744507. The next prime is 1340744549. The reversal of 1340744539 is 9354470431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340744539 - 2⁵ = 1340744507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340744549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670372269 + 670372270.

It is an arithmetic number, because the mean of its divisors is an integer number (670372270).

Almost surely, 2^1340744539 is an apocalyptic number.

1340744539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340744539 is an equidigital number, since it uses as much as digits as its factorization.

1340744539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 1340744539 is about 36616.1786509734. The cubic root of 1340744539 is about 1102.6779213852.

The spelling of 1340744539 in words is "one billion, three hundred forty million, seven hundred forty-four thousand, five hundred thirty-nine".