84679947 has 24 divisors (see below), whose sum is σ = 136281600. Its totient is φ = 50226480.

The previous prime is 84679937. The next prime is 84679949. The reversal of 84679947 is 74997648.

It is a happy number.

It is not a de Polignac number, because 84679947 - 2¹⁵ = 84647179 is a prime.

It is a super-3 number, since 3×84679947³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84679893 and 84679902.

It is not an unprimeable number, because it can be changed into a prime (84679949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4447 + ... + 13752.

It is an arithmetic number, because the mean of its divisors is an integer number (5678400).

Almost surely, 2^84679947 is an apocalyptic number.

84679947 is a deficient number, since it is larger than the sum of its proper divisors (51601653).

84679947 is a wasteful number, since it uses less digits than its factorization.

84679947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18263 (or 18260 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 84679947 is about 9202.1707765070. The cubic root of 84679947 is about 439.1304227277.

The spelling of 84679947 in words is "eighty-four million, six hundred seventy-nine thousand, nine hundred forty-seven".