84081439 has 8 divisors (see below), whose sum is σ = 95875920. Its totient is φ = 73047936.

The previous prime is 84081409. The next prime is 84081451. The reversal of 84081439 is 93418048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84081439 - 2⁷ = 84081311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84081398 and 84081407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84081409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190009 + ... + 190450.

It is an arithmetic number, because the mean of its divisors is an integer number (11984490).

Almost surely, 2^84081439 is an apocalyptic number.

84081439 is a deficient number, since it is larger than the sum of its proper divisors (11794481).

84081439 is a wasteful number, since it uses less digits than its factorization.

84081439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380489.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 84081439 is about 9169.5931752723. The cubic root of 84081439 is about 438.0934014721.

The spelling of 84081439 in words is "eighty-four million, eighty-one thousand, four hundred thirty-nine".