982180861 has 2 divisors, whose sum is σ = 982180862. Its totient is φ = 982180860.

The previous prime is 982180819. The next prime is 982180867. The reversal of 982180861 is 168081289.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794901636 + 187279225 = 28194^2 + 13685^2 .

It is a cyclic number.

It is not a de Polignac number, because 982180861 - 2⁹ = 982180349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (982180867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491090430 + 491090431.

It is an arithmetic number, because the mean of its divisors is an integer number (491090431).

Almost surely, 2^982180861 is an apocalyptic number.

It is an amenable number.

982180861 is a deficient number, since it is larger than the sum of its proper divisors (1).

982180861 is an equidigital number, since it uses as much as digits as its factorization.

982180861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 982180861 is about 31339.7648523405. The cubic root of 982180861 is about 994.0246533485.

The spelling of 982180861 in words is "nine hundred eighty-two million, one hundred eighty thousand, eight hundred sixty-one".