84684613 has 4 divisors (see below), whose sum is σ = 91198828. Its totient is φ = 78170400.

The previous prime is 84684581. The next prime is 84684623. The reversal of 84684613 is 31648648.

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 20412324 + 64272289 = 4518^2 + 8017^2 .

It is a cyclic number.

It is not a de Polignac number, because 84684613 - 2⁵ = 84684581 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 (84684623) 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, 3257088 + ... + 3257113.

It is an arithmetic number, because the mean of its divisors is an integer number (22799707).

Almost surely, 2^84684613 is an apocalyptic number.

It is an amenable number.

84684613 is a deficient number, since it is larger than the sum of its proper divisors (6514215).

84684613 is a wasteful number, since it uses less digits than its factorization.

84684613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6514214.

The product of its digits is 110592, while the sum is 40.

The square root of 84684613 is about 9202.4243001505. The cubic root of 84684613 is about 439.1384881748.

The spelling of 84684613 in words is "eighty-four million, six hundred eighty-four thousand, six hundred thirteen".