84729939 has 8 divisors (see below), whose sum is σ = 129112320. Its totient is φ = 48417096.

The previous prime is 84729923. The next prime is 84729947. The reversal of 84729939 is 93992748.

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

It is not a de Polignac number, because 84729939 - 2⁴ = 84729923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84729891 and 84729900.

It is not an unprimeable number, because it can be changed into a prime (84729919) 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 7 ways as a sum of consecutive naturals, for example, 2017359 + ... + 2017400.

It is an arithmetic number, because the mean of its divisors is an integer number (16139040).

Almost surely, 2^84729939 is an apocalyptic number.

84729939 is a deficient number, since it is larger than the sum of its proper divisors (44382381).

84729939 is a wasteful number, since it uses less digits than its factorization.

84729939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034769.

The product of its digits is 979776, while the sum is 51.

The square root of 84729939 is about 9204.8866913178. The cubic root of 84729939 is about 439.2168213387.

The spelling of 84729939 in words is "eighty-four million, seven hundred twenty-nine thousand, nine hundred thirty-nine".