216678967 has 2 divisors, whose sum is σ = 216678968. Its totient is φ = 216678966.

The previous prime is 216678881. The next prime is 216678989. The reversal of 216678967 is 769876612.

It is a happy number.

216678967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216678967 - 2¹¹ = 216676919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216678167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108339483 + 108339484.

It is an arithmetic number, because the mean of its divisors is an integer number (108339484).

Almost surely, 2^216678967 is an apocalyptic number.

216678967 is a deficient number, since it is larger than the sum of its proper divisors (1).

216678967 is an equidigital number, since it uses as much as digits as its factorization.

216678967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 216678967 is about 14720.0192594983. The cubic root of 216678967 is about 600.6280155795.

The spelling of 216678967 in words is "two hundred sixteen million, six hundred seventy-eight thousand, nine hundred sixty-seven".