845800491 has 4 divisors (see below), whose sum is σ = 1127733992. Its totient is φ = 563866992.

The previous prime is 845800489. The next prime is 845800537. The reversal of 845800491 is 194008548.

845800491 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.

It is not a de Polignac number, because 845800491 - 2¹ = 845800489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845800471) 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, 140966746 + ... + 140966751.

It is an arithmetic number, because the mean of its divisors is an integer number (281933498).

Almost surely, 2^845800491 is an apocalyptic number.

845800491 is a deficient number, since it is larger than the sum of its proper divisors (281933501).

845800491 is a wasteful number, since it uses less digits than its factorization.

845800491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281933500.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 845800491 is about 29082.6493119179. The cubic root of 845800491 is about 945.7056368470.

The spelling of 845800491 in words is "eight hundred forty-five million, eight hundred thousand, four hundred ninety-one".