1340004439 has 2 divisors, whose sum is σ = 1340004440. Its totient is φ = 1340004438.

The previous prime is 1340004433. The next prime is 1340004443. The reversal of 1340004439 is 9344000431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340004439 - 2¹³ = 1339996247 is a prime.

It is a super-2 number, since 2×1340004439² = 3591223793079409442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340004433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670002219 + 670002220.

It is an arithmetic number, because the mean of its divisors is an integer number (670002220).

Almost surely, 2^1340004439 is an apocalyptic number.

1340004439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340004439 is an equidigital number, since it uses as much as digits as its factorization.

1340004439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1340004439 is about 36606.0710675156. The cubic root of 1340004439 is about 1102.4749888317.

The spelling of 1340004439 in words is "one billion, three hundred forty million, four thousand, four hundred thirty-nine".