82099081 has 4 divisors (see below), whose sum is σ = 82128964. Its totient is φ = 82069200.

The previous prime is 82099079. The next prime is 82099111. The reversal of 82099081 is 18099028.

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 75255625 + 6843456 = 8675^2 + 2616^2 .

It is a cyclic number.

It is not a de Polignac number, because 82099081 - 2¹ = 82099079 is a prime.

It is a super-2 number, since 2×82099081² = 13480518202089122, which contains 22 as substring.

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 82099081.

It is not an unprimeable number, because it can be changed into a prime (82099051) 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, 10350 + ... + 16471.

It is an arithmetic number, because the mean of its divisors is an integer number (20532241).

Almost surely, 2^82099081 is an apocalyptic number.

It is an amenable number.

82099081 is a deficient number, since it is larger than the sum of its proper divisors (29883).

82099081 is a wasteful number, since it uses less digits than its factorization.

82099081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29882.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 82099081 is about 9060.8543195440. The cubic root of 82099081 is about 434.6230600860.

The spelling of 82099081 in words is "eighty-two million, ninety-nine thousand, eighty-one".