181347874 has 32 divisors (see below), whose sum is σ = 295787376. Its totient is φ = 83066880.

The previous prime is 181347871. The next prime is 181347889. The reversal of 181347874 is 478743181.

It can be written as a sum of positive squares in 8 ways, for example, as 154380625 + 26967249 = 12425^2 + 5193^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 181347874.

It is not an unprimeable number, because it can be changed into a prime (181347871) 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, 282594 + ... + 283234.

Almost surely, 2^181347874 is an apocalyptic number.

181347874 is a deficient number, since it is larger than the sum of its proper divisors (114439502).

181347874 is a wasteful number, since it uses less digits than its factorization.

181347874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its digits is 150528, while the sum is 43.

The square root of 181347874 is about 13466.5464763613. The cubic root of 181347874 is about 566.0274452182.

The spelling of 181347874 in words is "one hundred eighty-one million, three hundred forty-seven thousand, eight hundred seventy-four".