216706739 has 2 divisors, whose sum is σ = 216706740. Its totient is φ = 216706738.

The previous prime is 216706733. The next prime is 216706753. The reversal of 216706739 is 937607612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216706739 - 2¹² = 216702643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 216706696 and 216706705.

It is not a weakly prime, because it can be changed into another prime (216706733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108353369 + 108353370.

It is an arithmetic number, because the mean of its divisors is an integer number (108353370).

Almost surely, 2^216706739 is an apocalyptic number.

216706739 is a deficient number, since it is larger than the sum of its proper divisors (1).

216706739 is an equidigital number, since it uses as much as digits as its factorization.

216706739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 216706739 is about 14720.9625704300. The cubic root of 216706739 is about 600.6536755515.

The spelling of 216706739 in words is "two hundred sixteen million, seven hundred six thousand, seven hundred thirty-nine".