981673073 has 2 divisors, whose sum is σ = 981673074. Its totient is φ = 981673072.

The previous prime is 981673031. The next prime is 981673081. The reversal of 981673073 is 370376189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643738384 + 337934689 = 25372^2 + 18383^2 .

It is a cyclic number.

It is not a de Polignac number, because 981673073 - 2¹² = 981668977 is a prime.

It is not a weakly prime, because it can be changed into another prime (981673013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490836536 + 490836537.

It is an arithmetic number, because the mean of its divisors is an integer number (490836537).

Almost surely, 2^981673073 is an apocalyptic number.

It is an amenable number.

981673073 is a deficient number, since it is larger than the sum of its proper divisors (1).

981673073 is an equidigital number, since it uses as much as digits as its factorization.

981673073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 981673073 is about 31331.6624678615. The cubic root of 981673073 is about 993.8533200698.

The spelling of 981673073 in words is "nine hundred eighty-one million, six hundred seventy-three thousand, seventy-three".