80173505 has 4 divisors (see below), whose sum is σ = 96208212. Its totient is φ = 64138800.

The previous prime is 80173501. The next prime is 80173517. The reversal of 80173505 is 50537108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43546801 + 36626704 = 6599^2 + 6052^2 .

It is not a de Polignac number, because 80173505 - 2² = 80173501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80173501) 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 in 3 ways as a sum of consecutive naturals, for example, 8017346 + ... + 8017355.

It is an arithmetic number, because the mean of its divisors is an integer number (24052053).

Almost surely, 2^80173505 is an apocalyptic number.

It is an amenable number.

80173505 is a deficient number, since it is larger than the sum of its proper divisors (16034707).

80173505 is a wasteful number, since it uses less digits than its factorization.

80173505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034706.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 80173505 is about 8953.9658811054. The cubic root of 80173505 is about 431.1982174049.

The spelling of 80173505 in words is "eighty million, one hundred seventy-three thousand, five hundred five".