349813381 has 4 divisors (see below), whose sum is σ = 350110764. Its totient is φ = 349516000.

The previous prime is 349813357. The next prime is 349813391. The reversal of 349813381 is 183318943.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276556900 + 73256481 = 16630^2 + 8559^2 .

It is a cyclic number.

It is not a de Polignac number, because 349813381 - 2⁵ = 349813349 is a prime.

It is a super-2 number, since 2×349813381² = 244738803053302322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349813391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146920 + ... + 149281.

It is an arithmetic number, because the mean of its divisors is an integer number (87527691).

Almost surely, 2^349813381 is an apocalyptic number.

It is an amenable number.

349813381 is a deficient number, since it is larger than the sum of its proper divisors (297383).

349813381 is a wasteful number, since it uses less digits than its factorization.

349813381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297382.

The product of its digits is 62208, while the sum is 40.

The square root of 349813381 is about 18703.2986662781. The cubic root of 349813381 is about 704.6045976200.

The spelling of 349813381 in words is "three hundred forty-nine million, eight hundred thirteen thousand, three hundred eighty-one".