84000399 has 16 divisors (see below), whose sum is σ = 129545472. Its totient is φ = 47420928.

The previous prime is 84000377. The next prime is 84000401. The reversal of 84000399 is 99300048.

It is not a de Polignac number, because 84000399 - 2⁸ = 84000143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84000799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22354 + ... + 25839.

It is an arithmetic number, because the mean of its divisors is an integer number (8096592).

Almost surely, 2^84000399 is an apocalyptic number.

84000399 is a deficient number, since it is larger than the sum of its proper divisors (45545073).

84000399 is a wasteful number, since it uses less digits than its factorization.

84000399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48286.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 84000399 is about 9165.1731571204. The cubic root of 84000399 is about 437.9526074116.

It can be divided in two parts, 8400039 and 9, that added together give a palindrome (8400048).

The spelling of 84000399 in words is "eighty-four million, three hundred ninety-nine", and thus it is an aban number.