84873139 has 4 divisors (see below), whose sum is σ = 91401856. Its totient is φ = 78344424.

The previous prime is 84873137. The next prime is 84873167. The reversal of 84873139 is 93137848.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84873139 - 2¹ = 84873137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84873095 and 84873104.

It is not an unprimeable number, because it can be changed into a prime (84873137) 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, 3264339 + ... + 3264364.

It is an arithmetic number, because the mean of its divisors is an integer number (22850464).

Almost surely, 2^84873139 is an apocalyptic number.

84873139 is a deficient number, since it is larger than the sum of its proper divisors (6528717).

84873139 is a wasteful number, since it uses less digits than its factorization.

84873139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528716.

The product of its digits is 145152, while the sum is 43.

The square root of 84873139 is about 9212.6618846021. The cubic root of 84873139 is about 439.4641186140.

The spelling of 84873139 in words is "eighty-four million, eight hundred seventy-three thousand, one hundred thirty-nine".