854859509 has 8 divisors (see below), whose sum is σ = 977208960. Its totient is φ = 732566736.

The previous prime is 854859497. The next prime is 854859529. The reversal of 854859509 is 905958458.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-854859509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854859529) 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, 25607 + ... + 48635.

It is an arithmetic number, because the mean of its divisors is an integer number (122151120).

Almost surely, 2^854859509 is an apocalyptic number.

It is an amenable number.

854859509 is a deficient number, since it is larger than the sum of its proper divisors (122349451).

854859509 is a wasteful number, since it uses less digits than its factorization.

854859509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28339.

The product of its (nonzero) digits is 2592000, while the sum is 53.

The square root of 854859509 is about 29237.9805903212. The cubic root of 854859509 is about 949.0700073419.

The spelling of 854859509 in words is "eight hundred fifty-four million, eight hundred fifty-nine thousand, five hundred nine".