217072990733 has 2 divisors, whose sum is σ = 217072990734. Its totient is φ = 217072990732.

The previous prime is 217072990703. The next prime is 217072990753. The reversal of 217072990733 is 337099270712.

217072990733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216115273924 + 957716809 = 464882^2 + 30947^2 .

It is a cyclic number.

It is not a de Polignac number, because 217072990733 - 2¹⁶ = 217072925197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217072990703) 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, 108536495366 + 108536495367.

It is an arithmetic number, because the mean of its divisors is an integer number (108536495367).

Almost surely, 2^217072990733 is an apocalyptic number.

It is an amenable number.

217072990733 is a deficient number, since it is larger than the sum of its proper divisors (1).

217072990733 is an equidigital number, since it uses as much as digits as its factorization.

217072990733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000188, while the sum is 50.

The spelling of 217072990733 in words is "two hundred seventeen billion, seventy-two million, nine hundred ninety thousand, seven hundred thirty-three".