84712861 has 4 divisors (see below), whose sum is σ = 84980412. Its totient is φ = 84445312.

The previous prime is 84712843. The next prime is 84712867. The reversal of 84712861 is 16821748.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3171961 + 81540900 = 1781^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 84712861 - 2²³ = 76324253 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 84712861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84712867) 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, 133300 + ... + 133933.

It is an arithmetic number, because the mean of its divisors is an integer number (21245103).

Almost surely, 2^84712861 is an apocalyptic number.

It is an amenable number.

84712861 is a deficient number, since it is larger than the sum of its proper divisors (267551).

84712861 is a wasteful number, since it uses less digits than its factorization.

84712861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267550.

The product of its digits is 21504, while the sum is 37.

The square root of 84712861 is about 9203.9589851324. The cubic root of 84712861 is about 439.1873101294.

The spelling of 84712861 in words is "eighty-four million, seven hundred twelve thousand, eight hundred sixty-one".