84421567 has 4 divisors (see below), whose sum is σ = 84726616. Its totient is φ = 84116520.

The previous prime is 84421559. The next prime is 84421607. The reversal of 84421567 is 76512448.

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 84421567 - 2³ = 84421559 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 (84421517) 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, 152109 + ... + 152662.

It is an arithmetic number, because the mean of its divisors is an integer number (21181654).

Almost surely, 2^84421567 is an apocalyptic number.

84421567 is a deficient number, since it is larger than the sum of its proper divisors (305049).

84421567 is a wasteful number, since it uses less digits than its factorization.

84421567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305048.

The product of its digits is 53760, while the sum is 37.

The square root of 84421567 is about 9188.1209722119. The cubic root of 84421567 is about 438.6833349198.

The spelling of 84421567 in words is "eighty-four million, four hundred twenty-one thousand, five hundred sixty-seven".