80371909 has 2 divisors, whose sum is σ = 80371910. Its totient is φ = 80371908.

The previous prime is 80371829. The next prime is 80371939. The reversal of 80371909 is 90917308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78269409 + 2102500 = 8847^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 80371909 - 2⁹ = 80371397 is a prime.

It is equal to p_4689802 and since 80371909 and 4689802 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80371939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40185954 + 40185955.

It is an arithmetic number, because the mean of its divisors is an integer number (40185955).

Almost surely, 2^80371909 is an apocalyptic number.

It is an amenable number.

80371909 is a deficient number, since it is larger than the sum of its proper divisors (1).

80371909 is an equidigital number, since it uses as much as digits as its factorization.

80371909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 80371909 is about 8965.0381482735. The cubic root of 80371909 is about 431.5536173469.

The spelling of 80371909 in words is "eighty million, three hundred seventy-one thousand, nine hundred nine".