82400343989 has 2 divisors, whose sum is σ = 82400343990. Its totient is φ = 82400343988.

The previous prime is 82400343979. The next prime is 82400344001. The reversal of 82400343989 is 98934300428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77038443364 + 5361900625 = 277558^2 + 73225^2 .

It is a cyclic number.

It is not a de Polignac number, because 82400343989 - 2⁸ = 82400343733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82400343979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41200171994 + 41200171995.

It is an arithmetic number, because the mean of its divisors is an integer number (41200171995).

Almost surely, 2^82400343989 is an apocalyptic number.

It is an amenable number.

82400343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

82400343989 is an equidigital number, since it uses as much as digits as its factorization.

82400343989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 82400343989 in words is "eighty-two billion, four hundred million, three hundred forty-three thousand, nine hundred eighty-nine".