854581807 has 4 divisors (see below), whose sum is σ = 854641480. Its totient is φ = 854522136.

The previous prime is 854581771. The next prime is 854581811. The reversal of 854581807 is 708185458.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(854581807) divides (854581807-1)³.

It is a cyclic number.

It is not a de Polignac number, because 854581807 - 2¹⁵ = 854549039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854581877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5968 + ... + 41770.

It is an arithmetic number, because the mean of its divisors is an integer number (213660370).

Almost surely, 2^854581807 is an apocalyptic number.

854581807 is the 23869-th pentagonal number.

854581807 is a deficient number, since it is larger than the sum of its proper divisors (59673).

854581807 is a wasteful number, since it uses less digits than its factorization.

854581807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59672.

The product of its (nonzero) digits is 358400, while the sum is 46.

The square root of 854581807 is about 29233.2312103879. The cubic root of 854581807 is about 948.9672274190.

The spelling of 854581807 in words is "eight hundred fifty-four million, five hundred eighty-one thousand, eight hundred seven".