80731065 has 16 divisors (see below), whose sum is σ = 130940928. Its totient is φ = 42466176.

The previous prime is 80731051. The next prime is 80731067. The reversal of 80731065 is 56013708.

It is not a de Polignac number, because 80731065 - 2⁵ = 80731033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80731067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35769 + ... + 37958.

It is an arithmetic number, because the mean of its divisors is an integer number (8183808).

Almost surely, 2^80731065 is an apocalyptic number.

It is an amenable number.

80731065 is a deficient number, since it is larger than the sum of its proper divisors (50209863).

80731065 is a wasteful number, since it uses less digits than its factorization.

80731065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73808.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 80731065 is about 8985.0467444527. The cubic root of 80731065 is about 432.1954865860.

The spelling of 80731065 in words is "eighty million, seven hundred thirty-one thousand, sixty-five".