7920133 has 4 divisors (see below), whose sum is σ = 8529388. Its totient is φ = 7310880.

The previous prime is 7920091. The next prime is 7920139. The reversal of 7920133 is 3310297.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 2712609 = 2282^2 + 1647^2 .

It is a cyclic number.

It is not a de Polignac number, because 7920133 - 2⁹ = 7919621 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7920098 and 7920107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304608 + ... + 304633.

It is an arithmetic number, because the mean of its divisors is an integer number (2132347).

Almost surely, 2^7920133 is an apocalyptic number.

It is an amenable number.

7920133 is a deficient number, since it is larger than the sum of its proper divisors (609255).

7920133 is a wasteful number, since it uses less digits than its factorization.

7920133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609254.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 7920133 is about 2814.2730855409. The cubic root of 7920133 is about 199.3322144606.

The spelling of 7920133 in words is "seven million, nine hundred twenty thousand, one hundred thirty-three".