216835673 has 2 divisors, whose sum is σ = 216835674. Its totient is φ = 216835672.

The previous prime is 216835649. The next prime is 216835681. The reversal of 216835673 is 376538612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123365449 + 93470224 = 11107^2 + 9668^2 .

It is a cyclic number.

It is not a de Polignac number, because 216835673 - 2¹⁰ = 216834649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216835673.

It is not a weakly prime, because it can be changed into another prime (216835603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108417836 + 108417837.

It is an arithmetic number, because the mean of its divisors is an integer number (108417837).

Almost surely, 2^216835673 is an apocalyptic number.

It is an amenable number.

216835673 is a deficient number, since it is larger than the sum of its proper divisors (1).

216835673 is an equidigital number, since it uses as much as digits as its factorization.

216835673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 216835673 is about 14725.3411845023. The cubic root of 216835673 is about 600.7727755655.

The spelling of 216835673 in words is "two hundred sixteen million, eight hundred thirty-five thousand, six hundred seventy-three".