873121845 has 16 divisors (see below), whose sum is σ = 1398301632. Its totient is φ = 465229440.

The previous prime is 873121817. The next prime is 873121897. The reversal of 873121845 is 548121378.

It is not a de Polignac number, because 873121845 - 2⁵ = 873121813 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10312 + ... + 43041.

It is an arithmetic number, because the mean of its divisors is an integer number (87393852).

Almost surely, 2^873121845 is an apocalyptic number.

It is an amenable number.

873121845 is a deficient number, since it is larger than the sum of its proper divisors (525179787).

873121845 is a wasteful number, since it uses less digits than its factorization.

873121845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54452.

The product of its digits is 53760, while the sum is 39.

The square root of 873121845 is about 29548.6352476726. The cubic root of 873121845 is about 955.7807618765.

The spelling of 873121845 in words is "eight hundred seventy-three million, one hundred twenty-one thousand, eight hundred forty-five".