181892049 has 16 divisors (see below), whose sum is σ = 246193920. Its totient is φ = 119433600.

The previous prime is 181891999. The next prime is 181892063. The reversal of 181892049 is 940298181.

It is not a de Polignac number, because 181892049 - 2¹⁵ = 181859281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181892049.

It is not an unprimeable number, because it can be changed into a prime (181892749) 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 15 ways as a sum of consecutive naturals, for example, 141799 + ... + 143075.

It is an arithmetic number, because the mean of its divisors is an integer number (15387120).

Almost surely, 2^181892049 is an apocalyptic number.

It is an amenable number.

181892049 is a deficient number, since it is larger than the sum of its proper divisors (64301871).

181892049 is a wasteful number, since it uses less digits than its factorization.

181892049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 181892049 is about 13486.7360395316. The cubic root of 181892049 is about 566.5930439915.

The spelling of 181892049 in words is "one hundred eighty-one million, eight hundred ninety-two thousand, forty-nine".