216673733 has 2 divisors, whose sum is σ = 216673734. Its totient is φ = 216673732.

The previous prime is 216673729. The next prime is 216673747. The reversal of 216673733 is 337376612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175483009 + 41190724 = 13247^2 + 6418^2 .

It is a cyclic number.

It is not a de Polignac number, because 216673733 - 2² = 216673729 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216673763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108336866 + 108336867.

It is an arithmetic number, because the mean of its divisors is an integer number (108336867).

Almost surely, 2^216673733 is an apocalyptic number.

It is an amenable number.

216673733 is a deficient number, since it is larger than the sum of its proper divisors (1).

216673733 is an equidigital number, since it uses as much as digits as its factorization.

216673733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 38.

The square root of 216673733 is about 14719.8414733312. The cubic root of 216673733 is about 600.6231793735.

The spelling of 216673733 in words is "two hundred sixteen million, six hundred seventy-three thousand, seven hundred thirty-three".