7873842917 has 2 divisors, whose sum is σ = 7873842918. Its totient is φ = 7873842916.

The previous prime is 7873842803. The next prime is 7873842929. The reversal of 7873842917 is 7192483787.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6887506081 + 986336836 = 82991^2 + 31406^2 .

It is a cyclic number.

It is not a de Polignac number, because 7873842917 - 2¹² = 7873838821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7873842947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936921458 + 3936921459.

It is an arithmetic number, because the mean of its divisors is an integer number (3936921459).

Almost surely, 2^7873842917 is an apocalyptic number.

It is an amenable number.

7873842917 is a deficient number, since it is larger than the sum of its proper divisors (1).

7873842917 is an equidigital number, since it uses as much as digits as its factorization.

7873842917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 7873842917 is about 88734.6770828632. The cubic root of 7873842917 is about 1989.4311579172.

The spelling of 7873842917 in words is "seven billion, eight hundred seventy-three million, eight hundred forty-two thousand, nine hundred seventeen".