349890191 has 32 divisors (see below), whose sum is σ = 435594240. Its totient is φ = 274450176.

The previous prime is 349890181. The next prime is 349890193. The reversal of 349890191 is 191098943.

It is not a de Polignac number, because 349890191 - 2¹⁰ = 349889167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349890193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639380 + ... + 639926.

It is an arithmetic number, because the mean of its divisors is an integer number (13612320).

Almost surely, 2^349890191 is an apocalyptic number.

349890191 is a deficient number, since it is larger than the sum of its proper divisors (85704049).

349890191 is a wasteful number, since it uses less digits than its factorization.

349890191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 349890191 is about 18705.3519346737. The cubic root of 349890191 is about 704.6561648474.

The spelling of 349890191 in words is "three hundred forty-nine million, eight hundred ninety thousand, one hundred ninety-one".