84878271 has 6 divisors (see below), whose sum is σ = 122601960. Its totient is φ = 56585508.

The previous prime is 84878249. The next prime is 84878317. The reversal of 84878271 is 17287848.

It is not a de Polignac number, because 84878271 - 2⁵ = 84878239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84878971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4715451 + ... + 4715468.

It is an arithmetic number, because the mean of its divisors is an integer number (20433660).

Almost surely, 2^84878271 is an apocalyptic number.

84878271 is a deficient number, since it is larger than the sum of its proper divisors (37723689).

84878271 is a wasteful number, since it uses less digits than its factorization.

84878271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430925 (or 9430922 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 84878271 is about 9212.9404100971. The cubic root of 84878271 is about 439.4729760861.

The spelling of 84878271 in words is "eighty-four million, eight hundred seventy-eight thousand, two hundred seventy-one".