7873842817 has 4 divisors (see below), whose sum is σ = 8007297840. Its totient is φ = 7740387796.

The previous prime is 7873842803. The next prime is 7873842917. The reversal of 7873842817 is 7182483787.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7182483787 = 10243 ⋅701209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7873842817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7873842917) 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, 66727423 + ... + 66727540.

It is an arithmetic number, because the mean of its divisors is an integer number (2001824460).

Almost surely, 2^7873842817 is an apocalyptic number.

It is an amenable number.

7873842817 is a deficient number, since it is larger than the sum of its proper divisors (133455023).

7873842817 is a wasteful number, since it uses less digits than its factorization.

7873842817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133455022.

The product of its digits is 4214784, while the sum is 55.

The square root of 7873842817 is about 88734.6765193856. The cubic root of 7873842817 is about 1989.4311494951.

The spelling of 7873842817 in words is "seven billion, eight hundred seventy-three million, eight hundred forty-two thousand, eight hundred seventeen".