216870967 has 2 divisors, whose sum is σ = 216870968. Its totient is φ = 216870966.

The previous prime is 216870923. The next prime is 216870971. The reversal of 216870967 is 769078612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216870967 - 2¹¹ = 216868919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216870977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108435483 + 108435484.

It is an arithmetic number, because the mean of its divisors is an integer number (108435484).

Almost surely, 2^216870967 is an apocalyptic number.

216870967 is a deficient number, since it is larger than the sum of its proper divisors (1).

216870967 is an equidigital number, since it uses as much as digits as its factorization.

216870967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 216870967 is about 14726.5395460033. The cubic root of 216870967 is about 600.8053694091.

The spelling of 216870967 in words is "two hundred sixteen million, eight hundred seventy thousand, nine hundred sixty-seven".