181872196 has 27 divisors (see below), whose sum is σ = 350412573. Its totient is φ = 82534320.

The previous prime is 181872191. The next prime is 181872209. The reversal of 181872196 is 691278181.

It is a happy number.

The square root of 181872196 is 13486.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 181279296 = 770^2 + 13464^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181872191) 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 8 ways as a sum of consecutive naturals, for example, 296386 + ... + 296998.

Almost surely, 2^181872196 is an apocalyptic number.

181872196 is the 13486-th square number.

It is an amenable number.

181872196 is a deficient number, since it is larger than the sum of its proper divisors (168540377).

181872196 is an equidigital number, since it uses as much as digits as its factorization.

181872196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 626 counting only the distinct ones).

The product of its digits is 48384, while the sum is 43.

The cubic root of 181872196 is about 566.5724292349.

The spelling of 181872196 in words is "one hundred eighty-one million, eight hundred seventy-two thousand, one hundred ninety-six".