84573743917 has 4 divisors (see below), whose sum is σ = 91079416540. Its totient is φ = 78068071296.

The previous prime is 84573743909. The next prime is 84573744011. The reversal of 84573743917 is 71934737548.

It is a happy number.

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 50918373801 + 33655370116 = 225651^2 + 183454^2 .

It is a cyclic number.

It is not a de Polignac number, because 84573743917 - 2³ = 84573743909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84571743917) 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, 3252836292 + ... + 3252836317.

It is an arithmetic number, because the mean of its divisors is an integer number (22769854135).

Almost surely, 2^84573743917 is an apocalyptic number.

It is an amenable number.

84573743917 is a deficient number, since it is larger than the sum of its proper divisors (6505672623).

84573743917 is a wasteful number, since it uses less digits than its factorization.

84573743917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505672622.

The product of its digits is 17781120, while the sum is 58.

The spelling of 84573743917 in words is "eighty-four billion, five hundred seventy-three million, seven hundred forty-three thousand, nine hundred seventeen".