80865173 has 4 divisors (see below), whose sum is σ = 81580908. Its totient is φ = 80149440.

The previous prime is 80865149. The next prime is 80865193. The reversal of 80865173 is 37156808.

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 4092529 + 76772644 = 2023^2 + 8762^2 .

It is a cyclic number.

It is not a de Polignac number, because 80865173 - 2²⁴ = 64087957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80865193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357698 + ... + 357923.

It is an arithmetic number, because the mean of its divisors is an integer number (20395227).

Almost surely, 2^80865173 is an apocalyptic number.

It is an amenable number.

80865173 is a deficient number, since it is larger than the sum of its proper divisors (715735).

80865173 is a wasteful number, since it uses less digits than its factorization.

80865173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715734.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 80865173 is about 8992.5064915184. The cubic root of 80865173 is about 432.4346708770.

The spelling of 80865173 in words is "eighty million, eight hundred sixty-five thousand, one hundred seventy-three".