84729847 has 4 divisors (see below), whose sum is σ = 84898800. Its totient is φ = 84560896.

The previous prime is 84729833. The next prime is 84729857. The reversal of 84729847 is 74892748.

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 84729847 - 2⁷ = 84729719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84729847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84729817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83722 + ... + 84727.

It is an arithmetic number, because the mean of its divisors is an integer number (21224700).

Almost surely, 2^84729847 is an apocalyptic number.

84729847 is a deficient number, since it is larger than the sum of its proper divisors (168953).

84729847 is a wasteful number, since it uses less digits than its factorization.

84729847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168952.

The product of its digits is 903168, while the sum is 49.

The square root of 84729847 is about 9204.8816939709. The cubic root of 84729847 is about 439.2166623711.

The spelling of 84729847 in words is "eighty-four million, seven hundred twenty-nine thousand, eight hundred forty-seven".