869738679917 has 4 divisors (see below), whose sum is σ = 869818828860. Its totient is φ = 869658530976.

The previous prime is 869738679881. The next prime is 869738679961. The reversal of 869738679917 is 719976837968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 669624709636 + 200113970281 = 818306^2 + 447341^2 .

It is a cyclic number.

It is not a de Polignac number, because 869738679917 - 2⁸ = 869738679661 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 (869738679317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40058192 + ... + 40079897.

It is an arithmetic number, because the mean of its divisors is an integer number (217454707215).

Almost surely, 2^869738679917 is an apocalyptic number.

It is an amenable number.

869738679917 is a deficient number, since it is larger than the sum of its proper divisors (80148943).

869738679917 is a wasteful number, since it uses less digits than its factorization.

869738679917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80148942.

The product of its digits is 1728324864, while the sum is 80.

The spelling of 869738679917 in words is "eight hundred sixty-nine billion, seven hundred thirty-eight million, six hundred seventy-nine thousand, nine hundred seventeen".