216832939 has 2 divisors, whose sum is σ = 216832940. Its totient is φ = 216832938.

The previous prime is 216832907. The next prime is 216832951. The reversal of 216832939 is 939238612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216832939 - 2⁵ = 216832907 is a prime.

It is equal to p_11957686 and since 216832939 and 11957686 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 216832895 and 216832904.

It is not a weakly prime, because it can be changed into another prime (216832999) 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, 108416469 + 108416470.

It is an arithmetic number, because the mean of its divisors is an integer number (108416470).

Almost surely, 2^216832939 is an apocalyptic number.

216832939 is a deficient number, since it is larger than the sum of its proper divisors (1).

216832939 is an equidigital number, since it uses as much as digits as its factorization.

216832939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 216832939 is about 14725.2483510466. The cubic root of 216832939 is about 600.7702505818.

The spelling of 216832939 in words is "two hundred sixteen million, eight hundred thirty-two thousand, nine hundred thirty-nine".