80972243369 has 2 divisors, whose sum is σ = 80972243370. Its totient is φ = 80972243368.

The previous prime is 80972243347. The next prime is 80972243371. The reversal of 80972243369 is 96334227908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75076000000 + 5896243369 = 274000^2 + 76787^2 .

It is a cyclic number.

It is not a de Polignac number, because 80972243369 - 2¹² = 80972239273 is a prime.

It is a super-2 number, since 2×80972243369² (a number of 23 digits) contains 22 as substring.

Together with 80972243371, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80972243369.

It is not a weakly prime, because it can be changed into another prime (80972243069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40486121684 + 40486121685.

It is an arithmetic number, because the mean of its divisors is an integer number (40486121685).

Almost surely, 2^80972243369 is an apocalyptic number.

It is an amenable number.

80972243369 is a deficient number, since it is larger than the sum of its proper divisors (1).

80972243369 is an equidigital number, since it uses as much as digits as its factorization.

80972243369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 80972243369 in words is "eighty billion, nine hundred seventy-two million, two hundred forty-three thousand, three hundred sixty-nine".