344699891639 has 2 divisors, whose sum is σ = 344699891640. Its totient is φ = 344699891638.

The previous prime is 344699891603. The next prime is 344699891719. The reversal of 344699891639 is 936198996443.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344699891639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344699891339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172349945819 + 172349945820.

It is an arithmetic number, because the mean of its divisors is an integer number (172349945820).

Almost surely, 2^344699891639 is an apocalyptic number.

344699891639 is a deficient number, since it is larger than the sum of its proper divisors (1).

344699891639 is an equidigital number, since it uses as much as digits as its factorization.

344699891639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272097792, while the sum is 71.

The spelling of 344699891639 in words is "three hundred forty-four billion, six hundred ninety-nine million, eight hundred ninety-one thousand, six hundred thirty-nine".