84816813 has 16 divisors (see below), whose sum is σ = 115057152. Its totient is φ = 55566000.

The previous prime is 84816803. The next prime is 84816857. The reversal of 84816813 is 31861848.

It is a de Polignac number, because none of the positive numbers 2^k-84816813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84816803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104178 + ... + 104988.

It is an arithmetic number, because the mean of its divisors is an integer number (7191072).

Almost surely, 2^84816813 is an apocalyptic number.

It is an amenable number.

84816813 is a deficient number, since it is larger than the sum of its proper divisors (30240339).

84816813 is a wasteful number, since it uses less digits than its factorization.

84816813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376.

The product of its digits is 36864, while the sum is 39.

The square root of 84816813 is about 9209.6043888975. The cubic root of 84816813 is about 439.3668804140.

The spelling of 84816813 in words is "eighty-four million, eight hundred sixteen thousand, eight hundred thirteen".