217283468979 has 8 divisors (see below), whose sum is σ = 293791732992. Its totient is φ = 142815425480.

The previous prime is 217283468951. The next prime is 217283469001. The reversal of 217283468979 is 979864382712.

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

It is a cyclic number.

It is not a de Polignac number, because 217283468979 - 2¹² = 217283464883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217283466979) 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, 510054879 + ... + 510055304.

It is an arithmetic number, because the mean of its divisors is an integer number (36723966624).

Almost surely, 2^217283468979 is an apocalyptic number.

217283468979 is a deficient number, since it is larger than the sum of its proper divisors (76508264013).

217283468979 is a wasteful number, since it uses less digits than its factorization.

217283468979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020110257.

The product of its digits is 73156608, while the sum is 66.

The spelling of 217283468979 in words is "two hundred seventeen billion, two hundred eighty-three million, four hundred sixty-eight thousand, nine hundred seventy-nine".