82712569 has 4 divisors (see below), whose sum is σ = 82797696. Its totient is φ = 82627444.

The previous prime is 82712563. The next prime is 82712573. The reversal of 82712569 is 96521728.

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 82712569 - 2³ = 82712561 is a prime.

It is a super-2 number, since 2×82712569² = 13682738141159522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82712561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41089 + ... + 43054.

It is an arithmetic number, because the mean of its divisors is an integer number (20699424).

Almost surely, 2^82712569 is an apocalyptic number.

It is an amenable number.

82712569 is a deficient number, since it is larger than the sum of its proper divisors (85127).

82712569 is an equidigital number, since it uses as much as digits as its factorization.

82712569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85126.

The product of its digits is 60480, while the sum is 40.

The square root of 82712569 is about 9094.6450727887. The cubic root of 82712569 is about 435.7029529155.

The spelling of 82712569 in words is "eighty-two million, seven hundred twelve thousand, five hundred sixty-nine".