82102984421 has 4 divisors (see below), whose sum is σ = 82113533100. Its totient is φ = 82092435744.

The previous prime is 82102984417. The next prime is 82102984429. The reversal of 82102984421 is 12448920128.

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 17695650625 + 64407333796 = 133025^2 + 253786^2 .

It is a cyclic number.

It is not a de Polignac number, because 82102984421 - 2² = 82102984417 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 (82102984429) 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, 5262656 + ... + 5278233.

It is an arithmetic number, because the mean of its divisors is an integer number (20528383275).

Almost surely, 2^82102984421 is an apocalyptic number.

It is an amenable number.

82102984421 is a deficient number, since it is larger than the sum of its proper divisors (10548679).

82102984421 is a wasteful number, since it uses less digits than its factorization.

82102984421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10548678.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 82102984421 in words is "eighty-two billion, one hundred two million, nine hundred eighty-four thousand, four hundred twenty-one".