181973043 has 24 divisors (see below), whose sum is σ = 300837888. Its totient is φ = 103833072.

The previous prime is 181973039. The next prime is 181973059. The reversal of 181973043 is 340379181.

It is a happy number.

It is not a de Polignac number, because 181973043 - 2² = 181973039 is a prime.

It is a super-2 number, since 2×181973043² = 66228376757359698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181972989 and 181973007.

It is not an unprimeable number, because it can be changed into a prime (181973003) 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 23 ways as a sum of consecutive naturals, for example, 52696 + ... + 56042.

It is an arithmetic number, because the mean of its divisors is an integer number (12534912).

Almost surely, 2^181973043 is an apocalyptic number.

181973043 is a deficient number, since it is larger than the sum of its proper divisors (118864845).

181973043 is a wasteful number, since it uses less digits than its factorization.

181973043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 181973043 is about 13489.7384333426. The cubic root of 181973043 is about 566.6771301797.

The spelling of 181973043 in words is "one hundred eighty-one million, nine hundred seventy-three thousand, forty-three".