181983853 has 2 divisors, whose sum is σ = 181983854. Its totient is φ = 181983852.

The previous prime is 181983779. The next prime is 181983877. The reversal of 181983853 is 358389181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149744169 + 32239684 = 12237^2 + 5678^2 .

It is a cyclic number.

It is not a de Polignac number, because 181983853 - 2²¹ = 179886701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181981853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90991926 + 90991927.

It is an arithmetic number, because the mean of its divisors is an integer number (90991927).

Almost surely, 2^181983853 is an apocalyptic number.

It is an amenable number.

181983853 is a deficient number, since it is larger than the sum of its proper divisors (1).

181983853 is an equidigital number, since it uses as much as digits as its factorization.

181983853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 46.

The square root of 181983853 is about 13490.1391023221. The cubic root of 181983853 is about 566.6883509964.

The spelling of 181983853 in words is "one hundred eighty-one million, nine hundred eighty-three thousand, eight hundred fifty-three".