82652821 has 4 divisors (see below), whose sum is σ = 82798144. Its totient is φ = 82507500.

The previous prime is 82652819. The next prime is 82652839. The reversal of 82652821 is 12825628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82652821 - 2¹ = 82652819 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 (82652891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71805 + ... + 72946.

It is an arithmetic number, because the mean of its divisors is an integer number (20699536).

Almost surely, 2^82652821 is an apocalyptic number.

It is an amenable number.

82652821 is a deficient number, since it is larger than the sum of its proper divisors (145323).

82652821 is a wasteful number, since it uses less digits than its factorization.

82652821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145322.

The product of its digits is 15360, while the sum is 34.

The square root of 82652821 is about 9091.3596892874. The cubic root of 82652821 is about 435.5980166239.

The spelling of 82652821 in words is "eighty-two million, six hundred fifty-two thousand, eight hundred twenty-one".