82408591 has 4 divisors (see below), whose sum is σ = 82427800. Its totient is φ = 82389384.

The previous prime is 82408577. The next prime is 82408603. The reversal of 82408591 is 19580428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82408591 - 2⁷ = 82408463 is a prime.

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 82408591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82408541) 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, 100 + ... + 12838.

It is an arithmetic number, because the mean of its divisors is an integer number (20606950).

Almost surely, 2^82408591 is an apocalyptic number.

82408591 is a deficient number, since it is larger than the sum of its proper divisors (19209).

82408591 is a wasteful number, since it uses less digits than its factorization.

82408591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19208.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 82408591 is about 9077.9177678584. The cubic root of 82408591 is about 435.1685452476.

The spelling of 82408591 in words is "eighty-two million, four hundred eight thousand, five hundred ninety-one".