82563817 has 4 divisors (see below), whose sum is σ = 94358656. Its totient is φ = 70768980.

The previous prime is 82563809. The next prime is 82563823. The reversal of 82563817 is 71836528.

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 a cyclic number.

It is not a de Polignac number, because 82563817 - 2³ = 82563809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82563817.

It is not an unprimeable number, because it can be changed into a prime (82563857) 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, 5897409 + ... + 5897422.

It is an arithmetic number, because the mean of its divisors is an integer number (23589664).

Almost surely, 2^82563817 is an apocalyptic number.

It is an amenable number.

82563817 is a deficient number, since it is larger than the sum of its proper divisors (11794839).

82563817 is a wasteful number, since it uses less digits than its factorization.

82563817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11794838.

The product of its digits is 80640, while the sum is 40.

The square root of 82563817 is about 9086.4633934221. The cubic root of 82563817 is about 435.4416037711.

The spelling of 82563817 in words is "eighty-two million, five hundred sixty-three thousand, eight hundred seventeen".