84378393 has 24 divisors (see below), whose sum is σ = 134954976. Its totient is φ = 50371200.

The previous prime is 84378391. The next prime is 84378401. The reversal of 84378393 is 39387348.

It is a happy number.

It is not a de Polignac number, because 84378393 - 2¹ = 84378391 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84378391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (5623124).

Almost surely, 2^84378393 is an apocalyptic number.

It is an amenable number.

84378393 is a deficient number, since it is larger than the sum of its proper divisors (50576583).

84378393 is a wasteful number, since it uses less digits than its factorization.

84378393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805 (or 12802 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 84378393 is about 9185.7712251068. The cubic root of 84378393 is about 438.6085398781.

The spelling of 84378393 in words is "eighty-four million, three hundred seventy-eight thousand, three hundred ninety-three".