85430809 has 8 divisors (see below), whose sum is σ = 91219392. Its totient is φ = 79815120.

The previous prime is 85430791. The next prime is 85430843. The reversal of 85430809 is 90803458.

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 85430809 - 2⁵ = 85430777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85430869) 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, 42202 + ... + 44179.

It is an arithmetic number, because the mean of its divisors is an integer number (11402424).

Almost surely, 2^85430809 is an apocalyptic number.

It is an amenable number.

85430809 is a deficient number, since it is larger than the sum of its proper divisors (5788583).

85430809 is a wasteful number, since it uses less digits than its factorization.

85430809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86447.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 85430809 is about 9242.8788264263. The cubic root of 85430809 is about 440.4245368764.

The spelling of 85430809 in words is "eighty-five million, four hundred thirty thousand, eight hundred nine".