84085871 has 4 divisors (see below), whose sum is σ = 85340952. Its totient is φ = 82830792.

The previous prime is 84085831. The next prime is 84085873. The reversal of 84085871 is 17858048.

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 84085871 - 2¹⁴ = 84069487 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 (84085873) 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, 627440 + ... + 627573.

It is an arithmetic number, because the mean of its divisors is an integer number (21335238).

Almost surely, 2^84085871 is an apocalyptic number.

84085871 is a deficient number, since it is larger than the sum of its proper divisors (1255081).

84085871 is a wasteful number, since it uses less digits than its factorization.

84085871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255080.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 84085871 is about 9169.8348403883. The cubic root of 84085871 is about 438.1010987549.

The spelling of 84085871 in words is "eighty-four million, eighty-five thousand, eight hundred seventy-one".