349843691 has 2 divisors, whose sum is σ = 349843692. Its totient is φ = 349843690.

The previous prime is 349843687. The next prime is 349843709. The reversal of 349843691 is 196348943.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349843691 - 2² = 349843687 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349843661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174921845 + 174921846.

It is an arithmetic number, because the mean of its divisors is an integer number (174921846).

Almost surely, 2^349843691 is an apocalyptic number.

349843691 is a deficient number, since it is larger than the sum of its proper divisors (1).

349843691 is an equidigital number, since it uses as much as digits as its factorization.

349843691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The square root of 349843691 is about 18704.1089336007. The cubic root of 349843691 is about 704.6249474691.

The spelling of 349843691 in words is "three hundred forty-nine million, eight hundred forty-three thousand, six hundred ninety-one".