80586509 has 4 divisors (see below), whose sum is σ = 80666460. Its totient is φ = 80506560.

The previous prime is 80586469. The next prime is 80586521. The reversal of 80586509 is 90568508.

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 66373609 + 14212900 = 8147^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 80586509 - 2¹² = 80582413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80586559) 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, 38444 + ... + 40485.

It is an arithmetic number, because the mean of its divisors is an integer number (20166615).

Almost surely, 2^80586509 is an apocalyptic number.

It is an amenable number.

80586509 is a deficient number, since it is larger than the sum of its proper divisors (79951).

80586509 is a wasteful number, since it uses less digits than its factorization.

80586509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79950.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 80586509 is about 8976.9988860420. The cubic root of 80586509 is about 431.9373712507.

The spelling of 80586509 in words is "eighty million, five hundred eighty-six thousand, five hundred nine".