999953033 has 10 divisors (see below), whose sum is σ = 1055643114. Its totient is φ = 947200464.

The previous prime is 999953011. The next prime is 999953077. The reversal of 999953033 is 330359999.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 897781369 + 102171664 = 29963^2 + 10108^2 .

It is not a de Polignac number, because 999953033 - 2¹⁸ = 999690889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999953093) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 126485 + ... + 134157.

Almost surely, 2^999953033 is an apocalyptic number.

It is an amenable number.

999953033 is a deficient number, since it is larger than the sum of its proper divisors (55690081).

999953033 is an frugal number, since it uses more digits than its factorization.

999953033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749 (or 7692 counting only the distinct ones).

The product of its (nonzero) digits is 885735, while the sum is 50.

The square root of 999953033 is about 31622.0339794897. The cubic root of 999953033 is about 999.9843440882.

The spelling of 999953033 in words is "nine hundred ninety-nine million, nine hundred fifty-three thousand, thirty-three".