82549621 has 16 divisors (see below), whose sum is σ = 106242048. Its totient is φ = 62247600.

The previous prime is 82549613. The next prime is 82549669. The reversal of 82549621 is 12694528.

It is a cyclic number.

It is not a de Polignac number, because 82549621 - 2³ = 82549613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82540621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14905 + ... + 19678.

It is an arithmetic number, because the mean of its divisors is an integer number (6640128).

Almost surely, 2^82549621 is an apocalyptic number.

It is an amenable number.

82549621 is a deficient number, since it is larger than the sum of its proper divisors (23692427).

82549621 is a wasteful number, since it uses less digits than its factorization.

82549621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34632.

The product of its digits is 34560, while the sum is 37.

The square root of 82549621 is about 9085.6821978319. The cubic root of 82549621 is about 435.4166457707.

The spelling of 82549621 in words is "eighty-two million, five hundred forty-nine thousand, six hundred twenty-one".