982249781 has 2 divisors, whose sum is σ = 982249782. Its totient is φ = 982249780.

The previous prime is 982249747. The next prime is 982249847. The reversal of 982249781 is 187942289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963109156 + 19140625 = 31034^2 + 4375^2 .

It is an emirp because it is prime and its reverse (187942289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 982249781 - 2⁶ = 982249717 is a prime.

It is a super-2 number, since 2×982249781² = 1929629264549095922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (982249711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491124890 + 491124891.

It is an arithmetic number, because the mean of its divisors is an integer number (491124891).

Almost surely, 2^982249781 is an apocalyptic number.

It is an amenable number.

982249781 is a deficient number, since it is larger than the sum of its proper divisors (1).

982249781 is an equidigital number, since it uses as much as digits as its factorization.

982249781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 982249781 is about 31340.8643945887. The cubic root of 982249781 is about 994.0479031658.

The spelling of 982249781 in words is "nine hundred eighty-two million, two hundred forty-nine thousand, seven hundred eighty-one".