84873421 has 4 divisors (see below), whose sum is σ = 84929152. Its totient is φ = 84817692.

The previous prime is 84873419. The next prime is 84873433. The reversal of 84873421 is 12437848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84873421 - 2¹ = 84873419 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 (84873491) 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, 25515 + ... + 28648.

It is an arithmetic number, because the mean of its divisors is an integer number (21232288).

Almost surely, 2^84873421 is an apocalyptic number.

It is an amenable number.

84873421 is a deficient number, since it is larger than the sum of its proper divisors (55731).

84873421 is a wasteful number, since it uses less digits than its factorization.

84873421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55730.

The product of its digits is 43008, while the sum is 37.

The square root of 84873421 is about 9212.6771896121. The cubic root of 84873421 is about 439.4646053355.

The spelling of 84873421 in words is "eighty-four million, eight hundred seventy-three thousand, four hundred twenty-one".