216634933 has 2 divisors, whose sum is σ = 216634934. Its totient is φ = 216634932.

The previous prime is 216634931. The next prime is 216634967. The reversal of 216634933 is 339436612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216031204 + 603729 = 14698^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 216634933 - 2¹ = 216634931 is a prime.

Together with 216634931, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 216634892 and 216634901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216634931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108317466 + 108317467.

It is an arithmetic number, because the mean of its divisors is an integer number (108317467).

Almost surely, 2^216634933 is an apocalyptic number.

It is an amenable number.

216634933 is a deficient number, since it is larger than the sum of its proper divisors (1).

216634933 is an equidigital number, since it uses as much as digits as its factorization.

216634933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 216634933 is about 14718.5234653480. The cubic root of 216634933 is about 600.5873258190.

The spelling of 216634933 in words is "two hundred sixteen million, six hundred thirty-four thousand, nine hundred thirty-three".