84712879 has 4 divisors (see below), whose sum is σ = 84757176. Its totient is φ = 84668584.

The previous prime is 84712867. The next prime is 84712883. The reversal of 84712879 is 97821748.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84712879 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 (84712379) 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, 19144 + ... + 23149.

It is an arithmetic number, because the mean of its divisors is an integer number (21189294).

Almost surely, 2^84712879 is an apocalyptic number.

84712879 is a deficient number, since it is larger than the sum of its proper divisors (44297).

84712879 is a wasteful number, since it uses less digits than its factorization.

84712879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44296.

The product of its digits is 225792, while the sum is 46.

The square root of 84712879 is about 9203.9599629725. The cubic root of 84712879 is about 439.1873412360.

The spelling of 84712879 in words is "eighty-four million, seven hundred twelve thousand, eight hundred seventy-nine".