854693809 has 4 divisors (see below), whose sum is σ = 859811904. Its totient is φ = 849575716.

The previous prime is 854693783. The next prime is 854693857. The reversal of 854693809 is 908396458.

It is a happy number.

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 854693809 - 2⁷ = 854693681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854693899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558797 + ... + 2559130.

It is an arithmetic number, because the mean of its divisors is an integer number (214952976).

Almost surely, 2^854693809 is an apocalyptic number.

It is an amenable number.

854693809 is a deficient number, since it is larger than the sum of its proper divisors (5118095).

854693809 is a wasteful number, since it uses less digits than its factorization.

854693809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118094.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 854693809 is about 29235.1468099615. The cubic root of 854693809 is about 949.0086830111.

The spelling of 854693809 in words is "eight hundred fifty-four million, six hundred ninety-three thousand, eight hundred nine".