999903452 has 12 divisors (see below), whose sum is σ = 1750190736. Its totient is φ = 499848960.

The previous prime is 999903391. The next prime is 999903473. The reversal of 999903452 is 254309999.

It is a self number, because there is not a number n which added to its sum of digits gives 999903452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 44735.

It is an arithmetic number, because the mean of its divisors is an integer number (145849228).

Almost surely, 2^999903452 is an apocalyptic number.

It is an amenable number.

999903452 is a deficient number, since it is larger than the sum of its proper divisors (750287284).

999903452 is a wasteful number, since it uses less digits than its factorization.

999903452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51388 (or 51386 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 999903452 is about 31621.2500069178. The cubic root of 999903452 is about 999.9678162976.

The spelling of 999903452 in words is "nine hundred ninety-nine million, nine hundred three thousand, four hundred fifty-two".