80209897 has 2 divisors, whose sum is σ = 80209898. Its totient is φ = 80209896.

The previous prime is 80209891. The next prime is 80209919. The reversal of 80209897 is 79890208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 30591961 = 7044^2 + 5531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80209897 is a prime.

It is not a weakly prime, because it can be changed into another prime (80209891) 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, 40104948 + 40104949.

It is an arithmetic number, because the mean of its divisors is an integer number (40104949).

Almost surely, 2^80209897 is an apocalyptic number.

It is an amenable number.

80209897 is a deficient number, since it is larger than the sum of its proper divisors (1).

80209897 is an equidigital number, since it uses as much as digits as its factorization.

80209897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 80209897 is about 8955.9978226884. The cubic root of 80209897 is about 431.2634500601.

The spelling of 80209897 in words is "eighty million, two hundred nine thousand, eight hundred ninety-seven".