82868261 has 6 divisors (see below), whose sum is σ = 96397830. Its totient is φ = 71029896.

The previous prime is 82868207. The next prime is 82868263. The reversal of 82868261 is 16286828.

It can be written as a sum of positive squares in only one way, i.e., 52287361 + 30580900 = 7231^2 + 5530^2 .

It is not a de Polignac number, because 82868261 - 2²⁶ = 15759397 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 (82868263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845546 + ... + 845643.

It is an arithmetic number, because the mean of its divisors is an integer number (16066305).

Almost surely, 2^82868261 is an apocalyptic number.

It is an amenable number.

82868261 is a deficient number, since it is larger than the sum of its proper divisors (13529569).

82868261 is a wasteful number, since it uses less digits than its factorization.

82868261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691203 (or 1691196 counting only the distinct ones).

The product of its digits is 73728, while the sum is 41.

The square root of 82868261 is about 9103.2005910009. The cubic root of 82868261 is about 435.9761598642.

The spelling of 82868261 in words is "eighty-two million, eight hundred sixty-eight thousand, two hundred sixty-one".