181074349 has 4 divisors (see below), whose sum is σ = 181115964. Its totient is φ = 181032736.

The previous prime is 181074343. The next prime is 181074359. The reversal of 181074349 is 943470181.

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 139665124 + 41409225 = 11818^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 181074349 - 2¹⁹ = 180550061 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181074343) 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 3 ways as a sum of consecutive naturals, for example, 13402 + ... + 23275.

It is an arithmetic number, because the mean of its divisors is an integer number (45278991).

Almost surely, 2^181074349 is an apocalyptic number.

It is an amenable number.

181074349 is a deficient number, since it is larger than the sum of its proper divisors (41615).

181074349 is an equidigital number, since it uses as much as digits as its factorization.

181074349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41614.

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

The square root of 181074349 is about 13456.3869222017. The cubic root of 181074349 is about 565.7427243703.

The spelling of 181074349 in words is "one hundred eighty-one million, seventy-four thousand, three hundred forty-nine".