82681857 has 8 divisors (see below), whose sum is σ = 122491680. Its totient is φ = 55121220.

The previous prime is 82681853. The next prime is 82681873. The reversal of 82681857 is 75818628.

It is not a de Polignac number, because 82681857 - 2² = 82681853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82681853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531119 + ... + 1531172.

It is an arithmetic number, because the mean of its divisors is an integer number (15311460).

Almost surely, 2^82681857 is an apocalyptic number.

It is an amenable number.

82681857 is a deficient number, since it is larger than the sum of its proper divisors (39809823).

82681857 is a wasteful number, since it uses less digits than its factorization.

82681857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062300 (or 3062294 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 82681857 is about 9092.9564499122. The cubic root of 82681857 is about 435.6490192921.

It can be divided in two parts, 82681 and 857, that added together give a palindrome (83538).

The spelling of 82681857 in words is "eighty-two million, six hundred eighty-one thousand, eight hundred fifty-seven".