82998239021 has 4 divisors (see below), whose sum is σ = 83007530844. Its totient is φ = 82988947200.

The previous prime is 82998239003. The next prime is 82998239033. The reversal of 82998239021 is 12093289928.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47781588100 + 35216650921 = 218590^2 + 187661^2 .

It is a cyclic number.

It is not a de Polignac number, because 82998239021 - 2¹⁸ = 82997976877 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 (82998239041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632500 + ... + 4650381.

It is an arithmetic number, because the mean of its divisors is an integer number (20751882711).

Almost surely, 2^82998239021 is an apocalyptic number.

It is an amenable number.

82998239021 is a deficient number, since it is larger than the sum of its proper divisors (9291823).

82998239021 is an equidigital number, since it uses as much as digits as its factorization.

82998239021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291822.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 82998239021 in words is "eighty-two billion, nine hundred ninety-eight million, two hundred thirty-nine thousand, twenty-one".