82712857 has 8 divisors (see below), whose sum is σ = 83687040. Its totient is φ = 81744720.

The previous prime is 82712831. The next prime is 82712863. The reversal of 82712857 is 75821728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82712857 - 2¹⁹ = 82188569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82712827) 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 7 ways as a sum of consecutive naturals, for example, 29632 + ... + 32302.

It is an arithmetic number, because the mean of its divisors is an integer number (10460880).

Almost surely, 2^82712857 is an apocalyptic number.

It is an amenable number.

82712857 is a deficient number, since it is larger than the sum of its proper divisors (974183).

82712857 is a wasteful number, since it uses less digits than its factorization.

82712857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its digits is 62720, while the sum is 40.

The square root of 82712857 is about 9094.6609062680. The cubic root of 82712857 is about 435.7034586117.

The spelling of 82712857 in words is "eighty-two million, seven hundred twelve thousand, eight hundred fifty-seven".