84908581 has 8 divisors (see below), whose sum is σ = 87960600. Its totient is φ = 81903360.

The previous prime is 84908569. The next prime is 84908609. The reversal of 84908581 is 18580948.

It can be written as a sum of positive squares in 4 ways, for example, as 893025 + 84015556 = 945^2 + 9166^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84908581 - 2²¹ = 82811429 is a prime.

It is a super-2 number, since 2×84908581² = 14418934254867122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84908501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7986 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (10995075).

Almost surely, 2^84908581 is an apocalyptic number.

It is an amenable number.

84908581 is a deficient number, since it is larger than the sum of its proper divisors (3052019).

84908581 is a wasteful number, since it uses less digits than its factorization.

84908581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23399.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 84908581 is about 9214.5852321198. The cubic root of 84908581 is about 439.5252817410.

It can be divided in two parts, 8490 and 8581, that added together give a palindrome (17071).

The spelling of 84908581 in words is "eighty-four million, nine hundred eight thousand, five hundred eighty-one".