84139873 has 8 divisors (see below), whose sum is σ = 86570528. Its totient is φ = 81743904.

The previous prime is 84139843. The next prime is 84139879. The reversal of 84139873 is 37893148.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84139873 - 2¹⁷ = 84008801 is a prime.

It is a super-2 number, since 2×84139873² = 14159036456912258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84139879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711 + ... + 13492.

It is an arithmetic number, because the mean of its divisors is an integer number (10821316).

Almost surely, 2^84139873 is an apocalyptic number.

It is an amenable number.

84139873 is a deficient number, since it is larger than the sum of its proper divisors (2430655).

84139873 is a wasteful number, since it uses less digits than its factorization.

84139873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17343.

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

The square root of 84139873 is about 9172.7789137207. The cubic root of 84139873 is about 438.1948650933.

The spelling of 84139873 in words is "eighty-four million, one hundred thirty-nine thousand, eight hundred seventy-three".