82586409 has 4 divisors (see below), whose sum is σ = 110115216. Its totient is φ = 55057604.

The previous prime is 82586401. The next prime is 82586417. The reversal of 82586409 is 90468528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (82586401) and next prime (82586417).

It is a cyclic number.

It is not a de Polignac number, because 82586409 - 2³ = 82586401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82586401) 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 3 ways as a sum of consecutive naturals, for example, 13764399 + ... + 13764404.

It is an arithmetic number, because the mean of its divisors is an integer number (27528804).

Almost surely, 2^82586409 is an apocalyptic number.

It is an amenable number.

82586409 is a deficient number, since it is larger than the sum of its proper divisors (27528807).

82586409 is a wasteful number, since it uses less digits than its factorization.

82586409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27528806.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 82586409 is about 9087.7064763338. The cubic root of 82586409 is about 435.4813168881.

The spelling of 82586409 in words is "eighty-two million, five hundred eighty-six thousand, four hundred nine".