80243869 has 2 divisors, whose sum is σ = 80243870. Its totient is φ = 80243868.

The previous prime is 80243843. The next prime is 80243887. The reversal of 80243869 is 96834208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69939769 + 10304100 = 8363^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 80243869 - 2⁷ = 80243741 is a prime.

It is a super-2 number, since 2×80243869² = 12878157024178322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80243069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40121934 + 40121935.

It is an arithmetic number, because the mean of its divisors is an integer number (40121935).

Almost surely, 2^80243869 is an apocalyptic number.

It is an amenable number.

80243869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80243869 is an equidigital number, since it uses as much as digits as its factorization.

80243869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 80243869 is about 8957.8942279980. The cubic root of 80243869 is about 431.3243270614.

The spelling of 80243869 in words is "eighty million, two hundred forty-three thousand, eight hundred sixty-nine".