82921336789 has 8 divisors (see below), whose sum is σ = 87872906520. Its totient is φ = 78109248000.

The previous prime is 82921336787. The next prime is 82921336819. The reversal of 82921336789 is 98763312928.

It can be written as a sum of positive squares in 4 ways, for example, as 13203159025 + 69718177764 = 114905^2 + 264042^2 .

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 82921336789 - 2¹ = 82921336787 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 (82921336787) 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, 34869012 + ... + 34871389.

It is an arithmetic number, because the mean of its divisors is an integer number (10984113315).

Almost surely, 2^82921336789 is an apocalyptic number.

It is an amenable number.

82921336789 is a deficient number, since it is larger than the sum of its proper divisors (4951569731).

82921336789 is a wasteful number, since it uses less digits than its factorization.

82921336789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69740471.

The product of its digits is 7838208, while the sum is 58.

The spelling of 82921336789 in words is "eighty-two billion, nine hundred twenty-one million, three hundred thirty-six thousand, seven hundred eighty-nine".