999903453 has 8 divisors (see below), whose sum is σ = 1334100000. Its totient is φ = 666154608.

The previous prime is 999903391. The next prime is 999903473. The reversal of 999903453 is 354309999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999903453 - 2⁹ = 999902941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999903396 and 999903405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999903473) 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 7 ways as a sum of consecutive naturals, for example, 106678 + ... + 115671.

It is an arithmetic number, because the mean of its divisors is an integer number (166762500).

Almost surely, 2^999903453 is an apocalyptic number.

It is an amenable number.

999903453 is a deficient number, since it is larger than the sum of its proper divisors (334196547).

999903453 is a wasteful number, since it uses less digits than its factorization.

999903453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223851.

The product of its (nonzero) digits is 1180980, while the sum is 51.

The square root of 999903453 is about 31621.2500227300. The cubic root of 999903453 is about 999.9678166309.

The spelling of 999903453 in words is "nine hundred ninety-nine million, nine hundred three thousand, four hundred fifty-three".