82521877 has 8 divisors (see below), whose sum is σ = 85629656. Its totient is φ = 79460352.

The previous prime is 82521871. The next prime is 82521919. The reversal of 82521877 is 77812528.

It can be written as a sum of positive squares in 4 ways, for example, as 39828721 + 42693156 = 6311^2 + 6534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82521877 - 2⁷ = 82521749 is a prime.

It is a super-3 number, since 3×82521877³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82521871) 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, 7908 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (10703707).

Almost surely, 2^82521877 is an apocalyptic number.

It is an amenable number.

82521877 is a deficient number, since it is larger than the sum of its proper divisors (3107779).

82521877 is a wasteful number, since it uses less digits than its factorization.

82521877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23127.

The product of its digits is 62720, while the sum is 40.

The square root of 82521877 is about 9084.1552716805. The cubic root of 82521877 is about 435.3678607577.

The spelling of 82521877 in words is "eighty-two million, five hundred twenty-one thousand, eight hundred seventy-seven".