981081733 has 2 divisors, whose sum is σ = 981081734. Its totient is φ = 981081732.

The previous prime is 981081667. The next prime is 981081757. The reversal of 981081733 is 337180189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874207489 + 106874244 = 29567^2 + 10338^2 .

It is a cyclic number.

It is not a de Polignac number, because 981081733 - 2⁹ = 981081221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981081793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490540866 + 490540867.

It is an arithmetic number, because the mean of its divisors is an integer number (490540867).

Almost surely, 2^981081733 is an apocalyptic number.

It is an amenable number.

981081733 is a deficient number, since it is larger than the sum of its proper divisors (1).

981081733 is an equidigital number, since it uses as much as digits as its factorization.

981081733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 981081733 is about 31322.2242664853. The cubic root of 981081733 is about 993.6537209415.

The spelling of 981081733 in words is "nine hundred eighty-one million, eighty-one thousand, seven hundred thirty-three".