999533454903 has 8 divisors (see below), whose sum is σ = 1480790303600. Its totient is φ = 666355636584.

The previous prime is 999533454889. The next prime is 999533454947. The reversal of 999533454903 is 309454335999.

999533454903 is a `hidden beast` number, since 9 + 9 + 9 + 53 + 34 + 549 + 0 + 3 = 666.

It is not a de Polignac number, because 999533454903 - 2¹² = 999533450807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999533455903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18509878768 + ... + 18509878821.

It is an arithmetic number, because the mean of its divisors is an integer number (185098787950).

Almost surely, 2^999533454903 is an apocalyptic number.

999533454903 is a deficient number, since it is larger than the sum of its proper divisors (481256848697).

999533454903 is a wasteful number, since it uses less digits than its factorization.

999533454903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37019757598 (or 37019757592 counting only the distinct ones).

The product of its (nonzero) digits is 70858800, while the sum is 63.

It can be divided in two parts, 999533 and 454903, that added together give a square (1454436 = 1206²).

The spelling of 999533454903 in words is "nine hundred ninety-nine billion, five hundred thirty-three million, four hundred fifty-four thousand, nine hundred three".