8742831817 has 4 divisors (see below), whose sum is σ = 9202980880. Its totient is φ = 8282682756.

The previous prime is 8742831781. The next prime is 8742831821. The reversal of 8742831817 is 7181382478.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8742831817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8742831827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230074503 + ... + 230074540.

It is an arithmetic number, because the mean of its divisors is an integer number (2300745220).

Almost surely, 2^8742831817 is an apocalyptic number.

It is an amenable number.

8742831817 is a deficient number, since it is larger than the sum of its proper divisors (460149063).

8742831817 is a wasteful number, since it uses less digits than its factorization.

8742831817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460149062.

The product of its digits is 602112, while the sum is 49.

The square root of 8742831817 is about 93503.1112690909. Note that the first 3 decimals coincide. The cubic root of 8742831817 is about 2060.0797889886.

The spelling of 8742831817 in words is "eight billion, seven hundred forty-two million, eight hundred thirty-one thousand, eight hundred seventeen".