216439607 has 2 divisors, whose sum is σ = 216439608. Its totient is φ = 216439606.

The previous prime is 216439577. The next prime is 216439627. The reversal of 216439607 is 706934612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216439607 - 2⁶ = 216439543 is a prime.

It is a super-2 number, since 2×216439607² = 93692206956628898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216439627) 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, 108219803 + 108219804.

It is an arithmetic number, because the mean of its divisors is an integer number (108219804).

Almost surely, 2^216439607 is an apocalyptic number.

216439607 is a deficient number, since it is larger than the sum of its proper divisors (1).

216439607 is an equidigital number, since it uses as much as digits as its factorization.

216439607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 216439607 is about 14711.8865887418. The cubic root of 216439607 is about 600.4067676896.

The spelling of 216439607 in words is "two hundred sixteen million, four hundred thirty-nine thousand, six hundred seven".