349074181 has 4 divisors (see below), whose sum is σ = 349119072. Its totient is φ = 349029292.

The previous prime is 349074163. The next prime is 349074199. The reversal of 349074181 is 181470943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 181470943 = 23 ⋅7890041.

It is an interprime number because it is at equal distance from previous prime (349074163) and next prime (349074199).

It is a cyclic number.

It is not a de Polignac number, because 349074181 - 2¹¹ = 349072133 is a prime.

It is a super-2 number, since 2×349074181² = 243705567681641522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 349074181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349074161) 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, 7435 + ... + 27448.

It is an arithmetic number, because the mean of its divisors is an integer number (87279768).

Almost surely, 2^349074181 is an apocalyptic number.

349074181 is the 11817-th centered pentagonal number.

It is an amenable number.

349074181 is a deficient number, since it is larger than the sum of its proper divisors (44891).

349074181 is a wasteful number, since it uses less digits than its factorization.

349074181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44890.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 349074181 is about 18683.5269957254. The cubic root of 349074181 is about 704.1079413572.

The spelling of 349074181 in words is "three hundred forty-nine million, seventy-four thousand, one hundred eighty-one".