84042173 has 4 divisors (see below), whose sum is σ = 84065820. Its totient is φ = 84018528.

The previous prime is 84042163. The next prime is 84042181. The reversal of 84042173 is 37124048.

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 76352644 + 7689529 = 8738^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 84042173 - 2²⁰ = 82993597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84042143) 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, 5288 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (21016455).

Almost surely, 2^84042173 is an apocalyptic number.

It is an amenable number.

84042173 is a deficient number, since it is larger than the sum of its proper divisors (23647).

84042173 is a wasteful number, since it uses less digits than its factorization.

84042173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 84042173 is about 9167.4518269801. The cubic root of 84042173 is about 438.0251943696.

The spelling of 84042173 in words is "eighty-four million, forty-two thousand, one hundred seventy-three".