82509663 has 4 divisors (see below), whose sum is σ = 110012888. Its totient is φ = 55006440.

The previous prime is 82509659. The next prime is 82509673. The reversal of 82509663 is 36690528.

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

It is not a de Polignac number, because 82509663 - 2² = 82509659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82509613) 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, 13751608 + ... + 13751613.

It is an arithmetic number, because the mean of its divisors is an integer number (27503222).

Almost surely, 2^82509663 is an apocalyptic number.

82509663 is a deficient number, since it is larger than the sum of its proper divisors (27503225).

82509663 is a wasteful number, since it uses less digits than its factorization.

82509663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27503224.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 82509663 is about 9083.4829773606. The cubic root of 82509663 is about 435.3463802097.

The spelling of 82509663 in words is "eighty-two million, five hundred nine thousand, six hundred sixty-three".