981322673 has 2 divisors, whose sum is σ = 981322674. Its totient is φ = 981322672.

The previous prime is 981322649. The next prime is 981322679. The reversal of 981322673 is 376223189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971444224 + 9878449 = 31168^2 + 3143^2 .

It is a cyclic number.

It is not a de Polignac number, because 981322673 - 2⁶ = 981322609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981322673.

It is not a weakly prime, because it can be changed into another prime (981322679) 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, 490661336 + 490661337.

It is an arithmetic number, because the mean of its divisors is an integer number (490661337).

Almost surely, 2^981322673 is an apocalyptic number.

It is an amenable number.

981322673 is a deficient number, since it is larger than the sum of its proper divisors (1).

981322673 is an equidigital number, since it uses as much as digits as its factorization.

981322673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 981322673 is about 31326.0701812404. The cubic root of 981322673 is about 993.7350567852.

The spelling of 981322673 in words is "nine hundred eighty-one million, three hundred twenty-two thousand, six hundred seventy-three".