7842545873 has 2 divisors, whose sum is σ = 7842545874. Its totient is φ = 7842545872.

The previous prime is 7842545803. The next prime is 7842545891. The reversal of 7842545873 is 3785452487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7503544129 + 339001744 = 86623^2 + 18412^2 .

It is an emirp because it is prime and its reverse (3785452487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7842545873 - 2²⁰ = 7841497297 is a prime.

It is not a weakly prime, because it can be changed into another prime (7842545803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921272936 + 3921272937.

It is an arithmetic number, because the mean of its divisors is an integer number (3921272937).

Almost surely, 2^7842545873 is an apocalyptic number.

It is an amenable number.

7842545873 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842545873 is an equidigital number, since it uses as much as digits as its factorization.

7842545873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7526400, while the sum is 53.

The square root of 7842545873 is about 88558.1496701461. The cubic root of 7842545873 is about 1986.7917863177.

The spelling of 7842545873 in words is "seven billion, eight hundred forty-two million, five hundred forty-five thousand, eight hundred seventy-three".