349814393209 has 2 divisors, whose sum is σ = 349814393210. Its totient is φ = 349814393208.

The previous prime is 349814393179. The next prime is 349814393219. The reversal of 349814393209 is 902393418943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326732276025 + 23082117184 = 571605^2 + 151928^2 .

It is an emirp because it is prime and its reverse (902393418943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349814393209 - 2¹³ = 349814385017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349814393209.

It is not a weakly prime, because it can be changed into another prime (349814393219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174907196604 + 174907196605.

It is an arithmetic number, because the mean of its divisors is an integer number (174907196605).

Almost surely, 2^349814393209 is an apocalyptic number.

It is an amenable number.

349814393209 is a deficient number, since it is larger than the sum of its proper divisors (1).

349814393209 is an equidigital number, since it uses as much as digits as its factorization.

349814393209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 349814393209 in words is "three hundred forty-nine billion, eight hundred fourteen million, three hundred ninety-three thousand, two hundred nine".