82857149 has 2 divisors, whose sum is σ = 82857150. Its totient is φ = 82857148.

The previous prime is 82857077. The next prime is 82857161. The reversal of 82857149 is 94175828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41512249 + 41344900 = 6443^2 + 6430^2 .

It is a cyclic number.

It is not a de Polignac number, because 82857149 - 2²⁴ = 66079933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82857199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41428574 + 41428575.

It is an arithmetic number, because the mean of its divisors is an integer number (41428575).

Almost surely, 2^82857149 is an apocalyptic number.

It is an amenable number.

82857149 is a deficient number, since it is larger than the sum of its proper divisors (1).

82857149 is an equidigital number, since it uses as much as digits as its factorization.

82857149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 82857149 is about 9102.5902357516. The cubic root of 82857149 is about 435.9566719702.

The spelling of 82857149 in words is "eighty-two million, eight hundred fifty-seven thousand, one hundred forty-nine".