879217965217 has 4 divisors (see below), whose sum is σ = 879685885120. Its totient is φ = 878750045316.

The previous prime is 879217965167. The next prime is 879217965281. The reversal of 879217965217 is 712569712978.

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, and also an emirpimes, since its reverse is a distinct semiprime: 712569712978 = 2 ⋅356284856489.

It is a cyclic number.

It is not a de Polignac number, because 879217965217 - 2¹⁹ = 879217440929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879217905217) 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, 233957133 + ... + 233960890.

It is an arithmetic number, because the mean of its divisors is an integer number (219921471280).

Almost surely, 2^879217965217 is an apocalyptic number.

It is an amenable number.

879217965217 is a deficient number, since it is larger than the sum of its proper divisors (467919903).

879217965217 is a wasteful number, since it uses less digits than its factorization.

879217965217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467919902.

The product of its digits is 26671680, while the sum is 64.

The spelling of 879217965217 in words is "eight hundred seventy-nine billion, two hundred seventeen million, nine hundred sixty-five thousand, two hundred seventeen".