82787841 has 12 divisors (see below), whose sum is σ = 126616932. Its totient is φ = 51945216.

The previous prime is 82787839. The next prime is 82787849. The reversal of 82787841 is 14878728.

It can be written as a sum of positive squares in 2 ways, for example, as 62726400 + 20061441 = 7920^2 + 4479^2 .

It is not a de Polignac number, because 82787841 - 2¹ = 82787839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82787849) 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, 270396 + ... + 270701.

It is an arithmetic number, because the mean of its divisors is an integer number (10551411).

Almost surely, 2^82787841 is an apocalyptic number.

It is an amenable number.

82787841 is a deficient number, since it is larger than the sum of its proper divisors (43829091).

82787841 is a wasteful number, since it uses less digits than its factorization.

82787841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541120 (or 541117 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 82787841 is about 9098.7823910675. The cubic root of 82787841 is about 435.8350823263.

The spelling of 82787841 in words is "eighty-two million, seven hundred eighty-seven thousand, eight hundred forty-one".