216673907 has 4 divisors (see below), whose sum is σ = 219284520. Its totient is φ = 214063296.

The previous prime is 216673883. The next prime is 216673927. The reversal of 216673907 is 709376612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216673907 - 2⁸ = 216673651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216673927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305182 + ... + 1305347.

It is an arithmetic number, because the mean of its divisors is an integer number (54821130).

Almost surely, 2^216673907 is an apocalyptic number.

216673907 is a deficient number, since it is larger than the sum of its proper divisors (2610613).

216673907 is an equidigital number, since it uses as much as digits as its factorization.

216673907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610612.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 216673907 is about 14719.8473837197. The cubic root of 216673907 is about 600.6233401505.

The spelling of 216673907 in words is "two hundred sixteen million, six hundred seventy-three thousand, nine hundred seven".