349071817 has 2 divisors, whose sum is σ = 349071818. Its totient is φ = 349071816.

The previous prime is 349071787. The next prime is 349071847. The reversal of 349071817 is 718170943.

It is a balanced prime because it is at equal distance from previous prime (349071787) and next prime (349071847).

It can be written as a sum of positive squares in only one way, i.e., 224280576 + 124791241 = 14976^2 + 11171^2 .

It is a cyclic number.

It is not a de Polignac number, because 349071817 - 2²³ = 340683209 is a prime.

It is a super-2 number, since 2×349071817² = 243702266847362978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 349071817.

It is not a weakly prime, because it can be changed into another prime (349071847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174535908 + 174535909.

It is an arithmetic number, because the mean of its divisors is an integer number (174535909).

Almost surely, 2^349071817 is an apocalyptic number.

It is an amenable number.

349071817 is a deficient number, since it is larger than the sum of its proper divisors (1).

349071817 is an equidigital number, since it uses as much as digits as its factorization.

349071817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 349071817 is about 18683.4637313320. The cubic root of 349071817 is about 704.1063519005.

The spelling of 349071817 in words is "three hundred forty-nine million, seventy-one thousand, eight hundred seventeen".