182663981 has 2 divisors, whose sum is σ = 182663982. Its totient is φ = 182663980.

The previous prime is 182663939. The next prime is 182664007. The reversal of 182663981 is 189366281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 17926756 = 12835^2 + 4234^2 .

It is a cyclic number.

It is not a de Polignac number, because 182663981 - 2²² = 178469677 is a prime.

It is a super-2 number, since 2×182663981² = 66732259909536722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (182663381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91331990 + 91331991.

It is an arithmetic number, because the mean of its divisors is an integer number (91331991).

Almost surely, 2^182663981 is an apocalyptic number.

It is an amenable number.

182663981 is a deficient number, since it is larger than the sum of its proper divisors (1).

182663981 is an equidigital number, since it uses as much as digits as its factorization.

182663981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 182663981 is about 13515.3239324849. The cubic root of 182663981 is about 567.3934345499.

The spelling of 182663981 in words is "one hundred eighty-two million, six hundred sixty-three thousand, nine hundred eighty-one".