84678359 has 4 divisors (see below), whose sum is σ = 84794616. Its totient is φ = 84562104.

The previous prime is 84678323. The next prime is 84678367. The reversal of 84678359 is 95387648.

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 84678359 - 2¹⁶ = 84612823 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 (84678379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57029 + ... + 58494.

It is an arithmetic number, because the mean of its divisors is an integer number (21198654).

Almost surely, 2^84678359 is an apocalyptic number.

84678359 is a deficient number, since it is larger than the sum of its proper divisors (116257).

84678359 is a wasteful number, since it uses less digits than its factorization.

84678359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116256.

The product of its digits is 1451520, while the sum is 50.

The square root of 84678359 is about 9202.0844921137. The cubic root of 84678359 is about 439.1276777115.

The spelling of 84678359 in words is "eighty-four million, six hundred seventy-eight thousand, three hundred fifty-nine".