80517287 has 4 divisors (see below), whose sum is σ = 85253616. Its totient is φ = 75780960.

The previous prime is 80517259. The next prime is 80517289. The reversal of 80517287 is 78271508.

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

It is a cyclic number.

It is not a de Polignac number, because 80517287 - 2⁶ = 80517223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80517287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80517289) 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, 2368139 + ... + 2368172.

It is an arithmetic number, because the mean of its divisors is an integer number (21313404).

Almost surely, 2^80517287 is an apocalyptic number.

80517287 is a deficient number, since it is larger than the sum of its proper divisors (4736329).

80517287 is a wasteful number, since it uses less digits than its factorization.

80517287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736328.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 80517287 is about 8973.1425375952. The cubic root of 80517287 is about 431.8136609912.

The spelling of 80517287 in words is "eighty million, five hundred seventeen thousand, two hundred eighty-seven".