82864681 has 12 divisors (see below), whose sum is σ = 92664880. Its totient is φ = 73880640.

The previous prime is 82864679. The next prime is 82864693. The reversal of 82864681 is 18646828.

It is not a de Polignac number, because 82864681 - 2¹ = 82864679 is a prime.

It is a super-2 number, since 2×82864681² = 13733110714463522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82864631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2055 + ... + 13036.

Almost surely, 2^82864681 is an apocalyptic number.

It is an amenable number.

82864681 is a deficient number, since it is larger than the sum of its proper divisors (9800199).

82864681 is a wasteful number, since it uses less digits than its factorization.

82864681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15144 (or 15127 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 82864681 is about 9103.0039547393. The cubic root of 82864681 is about 435.9698815572.

The spelling of 82864681 in words is "eighty-two million, eight hundred sixty-four thousand, six hundred eighty-one".