855654909 has 4 divisors (see below), whose sum is σ = 1140873216. Its totient is φ = 570436604.

The previous prime is 855654853. The next prime is 855654941. The reversal of 855654909 is 909456558.

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 not a de Polignac number, because 855654909 - 2²⁷ = 721437181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855654209) 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, 142609149 + ... + 142609154.

It is an arithmetic number, because the mean of its divisors is an integer number (285218304).

Almost surely, 2^855654909 is an apocalyptic number.

It is an amenable number.

855654909 is a deficient number, since it is larger than the sum of its proper divisors (285218307).

855654909 is a wasteful number, since it uses less digits than its factorization.

855654909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285218306.

The product of its (nonzero) digits is 1944000, while the sum is 51.

The square root of 855654909 is about 29251.5795983738. The cubic root of 855654909 is about 949.3642686674.

The spelling of 855654909 in words is "eight hundred fifty-five million, six hundred fifty-four thousand, nine hundred nine".