845121803 has 4 divisors (see below), whose sum is σ = 856698888. Its totient is φ = 833544720.

The previous prime is 845121793. The next prime is 845121859. The reversal of 845121803 is 308121548.

845121803 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 a cyclic number.

It is not a de Polignac number, because 845121803 - 2⁴ = 845121787 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 845121803.

It is not an unprimeable number, because it can be changed into a prime (845121863) 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, 5788433 + ... + 5788578.

It is an arithmetic number, because the mean of its divisors is an integer number (214174722).

Almost surely, 2^845121803 is an apocalyptic number.

845121803 is a deficient number, since it is larger than the sum of its proper divisors (11577085).

845121803 is a wasteful number, since it uses less digits than its factorization.

845121803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11577084.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 845121803 is about 29070.9787072950. The cubic root of 845121803 is about 945.4526178330.

The spelling of 845121803 in words is "eight hundred forty-five million, one hundred twenty-one thousand, eight hundred three".