854039561 has 4 divisors (see below), whose sum is σ = 855535824. Its totient is φ = 852543300.

The previous prime is 854039521. The next prime is 854039579. The reversal of 854039561 is 165930458.

854039561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 854039561 - 2²² = 849845257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854039521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747275 + ... + 748416.

It is an arithmetic number, because the mean of its divisors is an integer number (213883956).

Almost surely, 2^854039561 is an apocalyptic number.

It is an amenable number.

854039561 is a deficient number, since it is larger than the sum of its proper divisors (1496263).

854039561 is a wasteful number, since it uses less digits than its factorization.

854039561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496262.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 854039561 is about 29223.9552593416. The cubic root of 854039561 is about 948.7664732596.

The spelling of 854039561 in words is "eight hundred fifty-four million, thirty-nine thousand, five hundred sixty-one".