216797 has 4 divisors (see below), whose sum is σ = 247776. Its totient is φ = 185820.

The previous prime is 216791. The next prime is 216803. The reversal of 216797 is 797612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (216791) and next prime (216803).

It is a cyclic number.

It is not a de Polignac number, because 216797 - 2⁴ = 216781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216791) 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, 15479 + ... + 15492.

It is an arithmetic number, because the mean of its divisors is an integer number (61944).

2²¹⁶⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

216797 is a deficient number, since it is larger than the sum of its proper divisors (30979).

216797 is an equidigital number, since it uses as much as digits as its factorization.

216797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30978.

The product of its digits is 5292, while the sum is 32.

The square root of 216797 is about 465.6146475359. The cubic root of 216797 is about 60.0737057170.

The spelling of 216797 in words is "two hundred sixteen thousand, seven hundred ninety-seven".