349256317 has 2 divisors, whose sum is σ = 349256318. Its totient is φ = 349256316.

The previous prime is 349256249. The next prime is 349256329. The reversal of 349256317 is 713652943.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324396121 + 24860196 = 18011^2 + 4986^2 .

It is a cyclic number.

It is not a de Polignac number, because 349256317 - 2⁷ = 349256189 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349256317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349256377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174628158 + 174628159.

It is an arithmetic number, because the mean of its divisors is an integer number (174628159).

Almost surely, 2^349256317 is an apocalyptic number.

It is an amenable number.

349256317 is a deficient number, since it is larger than the sum of its proper divisors (1).

349256317 is an equidigital number, since it uses as much as digits as its factorization.

349256317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 349256317 is about 18688.4006003724. The cubic root of 349256317 is about 704.2303805721.

The spelling of 349256317 in words is "three hundred forty-nine million, two hundred fifty-six thousand, three hundred seventeen".