2117679 has 16 divisors (see below), whose sum is σ = 3013632. Its totient is φ = 1319648.

The previous prime is 2117677. The next prime is 2117699. The reversal of 2117679 is 9767112.

It is not a de Polignac number, because 2117679 - 2¹ = 2117677 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917 + ... + 3569.

It is an arithmetic number, because the mean of its divisors is an integer number (188352).

2^2117679 is an apocalyptic number.

2117679 is a deficient number, since it is larger than the sum of its proper divisors (895953).

2117679 is a wasteful number, since it uses less digits than its factorization.

2117679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 5292, while the sum is 33.

The square root of 2117679 is about 1455.2247249136. The cubic root of 2117679 is about 128.4162676762.

The spelling of 2117679 in words is "two million, one hundred seventeen thousand, six hundred seventy-nine".