84438047 has 4 divisors (see below), whose sum is σ = 84456816. Its totient is φ = 84419280.

The previous prime is 84438041. The next prime is 84438073. The reversal of 84438047 is 74083448.

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 84438047 - 2¹⁴ = 84421663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84438047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84438041) 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, 1838 + ... + 13124.

It is an arithmetic number, because the mean of its divisors is an integer number (21114204).

Almost surely, 2^84438047 is an apocalyptic number.

84438047 is a deficient number, since it is larger than the sum of its proper divisors (18769).

84438047 is a wasteful number, since it uses less digits than its factorization.

84438047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18768.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 84438047 is about 9189.0177385834. The cubic root of 84438047 is about 438.7118783013.

The spelling of 84438047 in words is "eighty-four million, four hundred thirty-eight thousand, forty-seven".