80517907 has 4 divisors (see below), whose sum is σ = 81315216. Its totient is φ = 79720600.

The previous prime is 80517901. The next prime is 80517911. The reversal of 80517907 is 70971508.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80517907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80517901) 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, 398503 + ... + 398704.

It is an arithmetic number, because the mean of its divisors is an integer number (20328804).

Almost surely, 2^80517907 is an apocalyptic number.

80517907 is a deficient number, since it is larger than the sum of its proper divisors (797309).

80517907 is a wasteful number, since it uses less digits than its factorization.

80517907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797308.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 80517907 is about 8973.1770850686. The cubic root of 80517907 is about 431.8147693403.

The spelling of 80517907 in words is "eighty million, five hundred seventeen thousand, nine hundred seven".