216434773 has 2 divisors, whose sum is σ = 216434774. Its totient is φ = 216434772.

The previous prime is 216434753. The next prime is 216434789. The reversal of 216434773 is 377434612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216001809 + 432964 = 14697^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 216434773 - 2⁵ = 216434741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216434753) 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, 108217386 + 108217387.

It is an arithmetic number, because the mean of its divisors is an integer number (108217387).

Almost surely, 2^216434773 is an apocalyptic number.

It is an amenable number.

216434773 is a deficient number, since it is larger than the sum of its proper divisors (1).

216434773 is an equidigital number, since it uses as much as digits as its factorization.

216434773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 37.

The square root of 216434773 is about 14711.7222989016. The cubic root of 216434773 is about 600.4022977931.

The spelling of 216434773 in words is "two hundred sixteen million, four hundred thirty-four thousand, seven hundred seventy-three".