216787694 has 8 divisors (see below), whose sum is σ = 326531568. Its totient is φ = 107943840.

The previous prime is 216787687. The next prime is 216787721. The reversal of 216787694 is 496787612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224402 + ... + 225365.

It is an arithmetic number, because the mean of its divisors is an integer number (40816446).

Almost surely, 2^216787694 is an apocalyptic number.

216787694 is a deficient number, since it is larger than the sum of its proper divisors (109743874).

216787694 is a wasteful number, since it uses less digits than its factorization.

216787694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450010.

The product of its digits is 1016064, while the sum is 50.

The square root of 216787694 is about 14723.7119640395. The cubic root of 216787694 is about 600.7284615114.

The spelling of 216787694 in words is "two hundred sixteen million, seven hundred eighty-seven thousand, six hundred ninety-four".