216697 has 8 divisors (see below), whose sum is σ = 237440. Its totient is φ = 196560.

The previous prime is 216679. The next prime is 216703. The reversal of 216697 is 796612.

216697 is nontrivially palindromic in base 14.

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

It is not a de Polignac number, because 216697 - 2⁷ = 216569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (29680).

2²¹⁶⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

216697 is a deficient number, since it is larger than the sum of its proper divisors (20743).

216697 is a wasteful number, since it uses less digits than its factorization.

216697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its digits is 4536, while the sum is 31.

The square root of 216697 is about 465.5072502121. The cubic root of 216697 is about 60.0644677441.

The spelling of 216697 in words is "two hundred sixteen thousand, six hundred ninety-seven".