84381679 has 8 divisors (see below), whose sum is σ = 89149040. Its totient is φ = 79646976.

The previous prime is 84381673. The next prime is 84381683. The reversal of 84381679 is 97618348.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84381679 - 2¹⁵ = 84348911 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 (84381673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2754 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (11143630).

Almost surely, 2^84381679 is an apocalyptic number.

84381679 is a deficient number, since it is larger than the sum of its proper divisors (4767361).

84381679 is a wasteful number, since it uses less digits than its factorization.

84381679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16329.

The product of its digits is 290304, while the sum is 46.

The square root of 84381679 is about 9185.9500869534. The cubic root of 84381679 is about 438.6142334722.

The spelling of 84381679 in words is "eighty-four million, three hundred eighty-one thousand, six hundred seventy-nine".