80704289 has 8 divisors (see below), whose sum is σ = 83103720. Its totient is φ = 78316416.

The previous prime is 80704279. The next prime is 80704297. The reversal of 80704289 is 98240708.

It can be written as a sum of positive squares in 4 ways, for example, as 71656225 + 9048064 = 8465^2 + 3008^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80704289 - 2²⁰ = 79655713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80704279) 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, 12467 + ... + 17799.

It is an arithmetic number, because the mean of its divisors is an integer number (10387965).

Almost surely, 2^80704289 is an apocalyptic number.

It is an amenable number.

80704289 is a deficient number, since it is larger than the sum of its proper divisors (2399431).

80704289 is a wasteful number, since it uses less digits than its factorization.

80704289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 80704289 is about 8983.5565896809. The cubic root of 80704289 is about 432.1476993392.

The spelling of 80704289 in words is "eighty million, seven hundred four thousand, two hundred eighty-nine".