216794979 has 6 divisors (see below), whose sum is σ = 313148316. Its totient is φ = 144529980.

The previous prime is 216794971. The next prime is 216794993. The reversal of 216794979 is 979497612.

216794979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216794979 - 2³ = 216794971 is a prime.

It is a super-2 number, since 2×216794979² = 94000125839220882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216794971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12044157 + ... + 12044174.

It is an arithmetic number, because the mean of its divisors is an integer number (52191386).

Almost surely, 2^216794979 is an apocalyptic number.

216794979 is a deficient number, since it is larger than the sum of its proper divisors (96353337).

216794979 is a wasteful number, since it uses less digits than its factorization.

216794979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24088337 (or 24088334 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 216794979 is about 14723.9593520221. The cubic root of 216794979 is about 600.7351904570.

The spelling of 216794979 in words is "two hundred sixteen million, seven hundred ninety-four thousand, nine hundred seventy-nine".