981759973 has 2 divisors, whose sum is σ = 981759974. Its totient is φ = 981759972.

The previous prime is 981759971. The next prime is 981760007. The reversal of 981759973 is 379957189.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496086529 + 485673444 = 22273^2 + 22038^2 .

It is a cyclic number.

It is not a de Polignac number, because 981759973 - 2¹ = 981759971 is a prime.

Together with 981759971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981759971) 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, 490879986 + 490879987.

It is an arithmetic number, because the mean of its divisors is an integer number (490879987).

Almost surely, 2^981759973 is an apocalyptic number.

It is an amenable number.

981759973 is a deficient number, since it is larger than the sum of its proper divisors (1).

981759973 is an equidigital number, since it uses as much as digits as its factorization.

981759973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 58.

The square root of 981759973 is about 31333.0492132509. The cubic root of 981759973 is about 993.8826452792.

The spelling of 981759973 in words is "nine hundred eighty-one million, seven hundred fifty-nine thousand, nine hundred seventy-three".