349873221 has 16 divisors (see below), whose sum is σ = 481809600. Its totient is φ = 225664128.

The previous prime is 349873187. The next prime is 349873229. The reversal of 349873221 is 122378943.

It is not a de Polignac number, because 349873221 - 2⁶ = 349873157 is a prime.

It is a super-2 number, since 2×349873221² = 244822541545829682, 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 349873221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349873229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11065 + ... + 28673.

It is an arithmetic number, because the mean of its divisors is an integer number (30113100).

Almost surely, 2^349873221 is an apocalyptic number.

It is an amenable number.

349873221 is a deficient number, since it is larger than the sum of its proper divisors (131936379).

349873221 is a wasteful number, since it uses less digits than its factorization.

349873221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17828.

The product of its digits is 72576, while the sum is 39.

The square root of 349873221 is about 18704.8983156819. The cubic root of 349873221 is about 704.6447725032.

The spelling of 349873221 in words is "three hundred forty-nine million, eight hundred seventy-three thousand, two hundred twenty-one".