216984907 has 2 divisors, whose sum is σ = 216984908. Its totient is φ = 216984906.

The previous prime is 216984899. The next prime is 216984919. The reversal of 216984907 is 709489612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216984907 - 2³ = 216984899 is a prime.

It is not a weakly prime, because it can be changed into another prime (216985907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108492453 + 108492454.

It is an arithmetic number, because the mean of its divisors is an integer number (108492454).

Almost surely, 2^216984907 is an apocalyptic number.

216984907 is a deficient number, since it is larger than the sum of its proper divisors (1).

216984907 is an equidigital number, since it uses as much as digits as its factorization.

216984907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 216984907 is about 14730.4075639474. The cubic root of 216984907 is about 600.9105683357.

The spelling of 216984907 in words is "two hundred sixteen million, nine hundred eighty-four thousand, nine hundred seven".