349391181 has 16 divisors (see below), whose sum is σ = 469604160. Its totient is φ = 231060480.

The previous prime is 349391179. The next prime is 349391197. The reversal of 349391181 is 181193943.

It is a happy number.

It is not a de Polignac number, because 349391181 - 2¹ = 349391179 is a prime.

It is a super-2 number, since 2×349391181² = 244148394721149522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349391881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283675 + ... + 284903.

It is an arithmetic number, because the mean of its divisors is an integer number (29350260).

Almost surely, 2^349391181 is an apocalyptic number.

It is an amenable number.

349391181 is a deficient number, since it is larger than the sum of its proper divisors (120212979).

349391181 is a wasteful number, since it uses less digits than its factorization.

349391181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its digits is 23328, while the sum is 39.

The square root of 349391181 is about 18692.0084795615. The cubic root of 349391181 is about 704.3210142026.

The spelling of 349391181 in words is "three hundred forty-nine million, three hundred ninety-one thousand, one hundred eighty-one".