485020891 has 4 divisors (see below), whose sum is σ = 485097984. Its totient is φ = 484943800.

The previous prime is 485020889. The next prime is 485020919. The reversal of 485020891 is 198020584.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 485020891 - 2¹ = 485020889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 485020891.

It is not an unprimeable number, because it can be changed into a prime (485020801) 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, 28180 + ... + 42001.

It is an arithmetic number, because the mean of its divisors is an integer number (121274496).

Almost surely, 2^485020891 is an apocalyptic number.

485020891 is a deficient number, since it is larger than the sum of its proper divisors (77093).

485020891 is an equidigital number, since it uses as much as digits as its factorization.

485020891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77092.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 485020891 is about 22023.1898461599. The cubic root of 485020891 is about 785.6940815159.

The spelling of 485020891 in words is "four hundred eighty-five million, twenty thousand, eight hundred ninety-one".