2117969879 has 8 divisors (see below), whose sum is σ = 2202984960. Its totient is φ = 2033998200.

The previous prime is 2117969863. The next prime is 2117969891. The reversal of 2117969879 is 9789697112.

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 2117969879 - 2⁴ = 2117969863 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 (2117969179) 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, 256709 + ... + 264830.

It is an arithmetic number, because the mean of its divisors is an integer number (275373120).

Almost surely, 2^2117969879 is an apocalyptic number.

2117969879 is a deficient number, since it is larger than the sum of its proper divisors (85015081).

2117969879 is a wasteful number, since it uses less digits than its factorization.

2117969879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521701.

The product of its digits is 3429216, while the sum is 59.

The square root of 2117969879 is about 46021.4067472953. The cubic root of 2117969879 is about 1284.2214705092.

The spelling of 2117969879 in words is "two billion, one hundred seventeen million, nine hundred sixty-nine thousand, eight hundred seventy-nine".