349891349 has 2 divisors, whose sum is σ = 349891350. Its totient is φ = 349891348.

The previous prime is 349891343. The next prime is 349891357. The reversal of 349891349 is 943198943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349017124 + 874225 = 18682^2 + 935^2 .

It is an emirp because it is prime and its reverse (943198943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349891349 - 2²⁰ = 348842773 is a prime.

It is a super-2 number, since 2×349891349² = 244847912210079602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 349891297 and 349891306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349891343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174945674 + 174945675.

It is an arithmetic number, because the mean of its divisors is an integer number (174945675).

Almost surely, 2^349891349 is an apocalyptic number.

It is an amenable number.

349891349 is a deficient number, since it is larger than the sum of its proper divisors (1).

349891349 is an equidigital number, since it uses as much as digits as its factorization.

349891349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 349891349 is about 18705.3828883560. The cubic root of 349891349 is about 704.6569422255.

The spelling of 349891349 in words is "three hundred forty-nine million, eight hundred ninety-one thousand, three hundred forty-nine".