8123877217 has 4 divisors (see below), whose sum is σ = 8126843796. Its totient is φ = 8120910640.

The previous prime is 8123877187. The next prime is 8123877239. The reversal of 8123877217 is 7127783218.

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 3078474256 + 5045402961 = 55484^2 + 71031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8123877217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8123877257) 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, 1479178 + ... + 1484659.

It is an arithmetic number, because the mean of its divisors is an integer number (2031710949).

Almost surely, 2^8123877217 is an apocalyptic number.

It is an amenable number.

8123877217 is a deficient number, since it is larger than the sum of its proper divisors (2966579).

8123877217 is a wasteful number, since it uses less digits than its factorization.

8123877217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966578.

The product of its digits is 263424, while the sum is 46.

The square root of 8123877217 is about 90132.5535919182. The cubic root of 8123877217 is about 2010.2702718998.

The spelling of 8123877217 in words is "eight billion, one hundred twenty-three million, eight hundred seventy-seven thousand, two hundred seventeen".