80173609 has 2 divisors, whose sum is σ = 80173610. Its totient is φ = 80173608.

The previous prime is 80173591. The next prime is 80173619. The reversal of 80173609 is 90637108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60840000 + 19333609 = 7800^2 + 4397^2 .

It is a cyclic number.

It is not a de Polignac number, because 80173609 - 2⁷ = 80173481 is a prime.

It is not a weakly prime, because it can be changed into another prime (80173619) 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, 40086804 + 40086805.

It is an arithmetic number, because the mean of its divisors is an integer number (40086805).

Almost surely, 2^80173609 is an apocalyptic number.

It is an amenable number.

80173609 is a deficient number, since it is larger than the sum of its proper divisors (1).

80173609 is an equidigital number, since it uses as much as digits as its factorization.

80173609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 80173609 is about 8953.9716885860. The cubic root of 80173609 is about 431.1984038530.

The spelling of 80173609 in words is "eighty million, one hundred seventy-three thousand, six hundred nine".