80723065 has 4 divisors (see below), whose sum is σ = 96867684. Its totient is φ = 64578448.

The previous prime is 80723059. The next prime is 80723113. The reversal of 80723065 is 56032708.

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 64304361 + 16418704 = 8019^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 80723065 - 2⁹ = 80722553 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 8072302 + ... + 8072311.

It is an arithmetic number, because the mean of its divisors is an integer number (24216921).

Almost surely, 2^80723065 is an apocalyptic number.

It is an amenable number.

80723065 is a deficient number, since it is larger than the sum of its proper divisors (16144619).

80723065 is a wasteful number, since it uses less digits than its factorization.

80723065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16144618.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 80723065 is about 8984.6015493176. The cubic root of 80723065 is about 432.1812100573.

The spelling of 80723065 in words is "eighty million, seven hundred twenty-three thousand, sixty-five".