82921717093 has 4 divisors (see below), whose sum is σ = 85162844620. Its totient is φ = 80680589568.

The previous prime is 82921717079. The next prime is 82921717121. The reversal of 82921717093 is 39071712928.

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 42278350689 + 40643366404 = 205617^2 + 201602^2 .

It is a cyclic number.

It is not a de Polignac number, because 82921717093 - 2²⁵ = 82888162661 is a prime.

It is a super-2 number, since 2×82921717093² (a number of 23 digits) contains 22 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 (82921717013) 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, 1120563708 + ... + 1120563781.

It is an arithmetic number, because the mean of its divisors is an integer number (21290711155).

Almost surely, 2^82921717093 is an apocalyptic number.

It is an amenable number.

82921717093 is a deficient number, since it is larger than the sum of its proper divisors (2241127527).

82921717093 is a wasteful number, since it uses less digits than its factorization.

82921717093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241127526.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 82921717093 in words is "eighty-two billion, nine hundred twenty-one million, seven hundred seventeen thousand, ninety-three".