8921903 has 4 divisors (see below), whose sum is σ = 8927880. Its totient is φ = 8915928.

The previous prime is 8921873. The next prime is 8921911. The reversal of 8921903 is 3091298.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8921903 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 8921903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921603) 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, 1376 + ... + 4442.

It is an arithmetic number, because the mean of its divisors is an integer number (2231970).

Almost surely, 2^8921903 is an apocalyptic number.

8921903 is a deficient number, since it is larger than the sum of its proper divisors (5977).

8921903 is a wasteful number, since it uses less digits than its factorization.

8921903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 8921903 is about 2986.9554733876. The cubic root of 8921903 is about 207.4049731814.

The spelling of 8921903 in words is "eight million, nine hundred twenty-one thousand, nine hundred three".