181828193 has 2 divisors, whose sum is σ = 181828194. Its totient is φ = 181828192.

The previous prime is 181828189. The next prime is 181828259. The reversal of 181828193 is 391828181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174055249 + 7772944 = 13193^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 181828193 - 2² = 181828189 is a prime.

It is a super-2 number, since 2×181828193² = 66122983539290498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181828193.

It is not a weakly prime, because it can be changed into another prime (181828793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90914096 + 90914097.

It is an arithmetic number, because the mean of its divisors is an integer number (90914097).

Almost surely, 2^181828193 is an apocalyptic number.

It is an amenable number.

181828193 is a deficient number, since it is larger than the sum of its proper divisors (1).

181828193 is an equidigital number, since it uses as much as digits as its factorization.

181828193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 41.

The square root of 181828193 is about 13484.3684687122. The cubic root of 181828193 is about 566.5267324983.

The spelling of 181828193 in words is "one hundred eighty-one million, eight hundred twenty-eight thousand, one hundred ninety-three".