84678491 has 8 divisors (see below), whose sum is σ = 85469904. Its totient is φ = 83891200.

The previous prime is 84678487. The next prime is 84678493. The reversal of 84678491 is 19487648.

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 84678491 - 2² = 84678487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84678493) 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 7 ways as a sum of consecutive naturals, for example, 52091 + ... + 53691.

It is an arithmetic number, because the mean of its divisors is an integer number (10683738).

Almost surely, 2^84678491 is an apocalyptic number.

84678491 is a deficient number, since it is larger than the sum of its proper divisors (791413).

84678491 is a wasteful number, since it uses less digits than its factorization.

84678491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061.

The product of its digits is 387072, while the sum is 47.

The square root of 84678491 is about 9202.0916643989. The cubic root of 84678491 is about 439.1279058880.

The spelling of 84678491 in words is "eighty-four million, six hundred seventy-eight thousand, four hundred ninety-one".