181996853 has 2 divisors, whose sum is σ = 181996854. Its totient is φ = 181996852.

The previous prime is 181996823. The next prime is 181996879. The reversal of 181996853 is 358699181.

It is a happy number.

181996853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 82755409 = 9962^2 + 9097^2 .

It is a cyclic number.

It is not a de Polignac number, because 181996853 - 2²⁰ = 180948277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181996813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90998426 + 90998427.

It is an arithmetic number, because the mean of its divisors is an integer number (90998427).

Almost surely, 2^181996853 is an apocalyptic number.

It is an amenable number.

181996853 is a deficient number, since it is larger than the sum of its proper divisors (1).

181996853 is an equidigital number, since it uses as much as digits as its factorization.

181996853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 181996853 is about 13490.6209271479. The cubic root of 181996853 is about 566.7018444521.

It can be divided in two parts, 18199 and 6853, that added together give a palindrome (25052).

The spelling of 181996853 in words is "one hundred eighty-one million, nine hundred ninety-six thousand, eight hundred fifty-three".