858080609 has 4 divisors (see below), whose sum is σ = 878036016. Its totient is φ = 838125204.

The previous prime is 858080599. The next prime is 858080611. The reversal of 858080609 is 906080858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858080609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 858080609.

It is not an unprimeable number, because it can be changed into a prime (858080659) 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, 9977639 + ... + 9977724.

It is an arithmetic number, because the mean of its divisors is an integer number (219509004).

Almost surely, 2^858080609 is an apocalyptic number.

It is an amenable number.

858080609 is a deficient number, since it is larger than the sum of its proper divisors (19955407).

858080609 is a wasteful number, since it uses less digits than its factorization.

858080609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19955406.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 858080609 is about 29293.0129723796. The cubic root of 858080609 is about 950.2605412814.

The spelling of 858080609 in words is "eight hundred fifty-eight million, eighty thousand, six hundred nine".