9045850921 has 4 divisors (see below), whose sum is σ = 9173257344. Its totient is φ = 8918444500.

The previous prime is 9045850901. The next prime is 9045850963. The reversal of 9045850921 is 1290585409.

9045850921 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1290585409 = 22129 ⋅58321.

It is a cyclic number.

It is not a de Polignac number, because 9045850921 - 2⁵ = 9045850889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9045850901) 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, 63703105 + ... + 63703246.

It is an arithmetic number, because the mean of its divisors is an integer number (2293314336).

Almost surely, 2^9045850921 is an apocalyptic number.

It is an amenable number.

9045850921 is a deficient number, since it is larger than the sum of its proper divisors (127406423).

9045850921 is a wasteful number, since it uses less digits than its factorization.

9045850921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127406422.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 9045850921 is about 95109.6783771242. The cubic root of 9045850921 is about 2083.6102028248.

The spelling of 9045850921 in words is "nine billion, forty-five million, eight hundred fifty thousand, nine hundred twenty-one".