182211989 has 2 divisors, whose sum is σ = 182211990. Its totient is φ = 182211988.

The previous prime is 182211983. The next prime is 182212007. The reversal of 182211989 is 989112281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120275089 + 61936900 = 10967^2 + 7870^2 .

It is a cyclic number.

It is not a de Polignac number, because 182211989 - 2⁴ = 182211973 is a prime.

It is a super-2 number, since 2×182211989² = 66402417870672242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (182211983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91105994 + 91105995.

It is an arithmetic number, because the mean of its divisors is an integer number (91105995).

Almost surely, 2^182211989 is an apocalyptic number.

It is an amenable number.

182211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

182211989 is an equidigital number, since it uses as much as digits as its factorization.

182211989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 41.

The square root of 182211989 is about 13498.5921117722. The cubic root of 182211989 is about 566.9250533672.

The spelling of 182211989 in words is "one hundred eighty-two million, two hundred eleven thousand, nine hundred eighty-nine".