80712609 has 8 divisors (see below), whose sum is σ = 108158400. Its totient is φ = 53537616.

The previous prime is 80712607. The next prime is 80712613. The reversal of 80712609 is 90621708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80712609 - 2¹ = 80712607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80712609.

It is not an unprimeable number, because it can be changed into a prime (80712607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67002 + ... + 68195.

It is an arithmetic number, because the mean of its divisors is an integer number (13519800).

Almost surely, 2^80712609 is an apocalyptic number.

It is an amenable number.

80712609 is a deficient number, since it is larger than the sum of its proper divisors (27445791).

80712609 is a wasteful number, since it uses less digits than its factorization.

80712609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135399.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 80712609 is about 8984.0196460159. The cubic root of 80712609 is about 432.1625492121.

Subtracting 80712609 from its reverse (90621708), we obtain a palindrome (9909099).

The spelling of 80712609 in words is "eighty million, seven hundred twelve thousand, six hundred nine".