216970799 has 8 divisors (see below), whose sum is σ = 228036480. Its totient is φ = 206041176.

The previous prime is 216970777. The next prime is 216970807. The reversal of 216970799 is 997079612.

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

It is a de Polignac number, because none of the positive numbers 2^k-216970799 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 (216970739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30737 + ... + 37130.

It is an arithmetic number, because the mean of its divisors is an integer number (28504560).

Almost surely, 2^216970799 is an apocalyptic number.

216970799 is a deficient number, since it is larger than the sum of its proper divisors (11065681).

216970799 is a wasteful number, since it uses less digits than its factorization.

216970799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68029.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 216970799 is about 14729.9286827873. The cubic root of 216970799 is about 600.8975446495.

The spelling of 216970799 in words is "two hundred sixteen million, nine hundred seventy thousand, seven hundred ninety-nine".