7720133 has 4 divisors (see below), whose sum is σ = 7799820. Its totient is φ = 7640448.

The previous prime is 7720123. The next prime is 7720151. The reversal of 7720133 is 3310277.

7720133 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3310277 = 1213 ⋅2729.

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 5166529 = 1598^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 7720133 - 2¹⁰ = 7719109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7720099 and 7720108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39698 + ... + 39891.

It is an arithmetic number, because the mean of its divisors is an integer number (1949955).

Almost surely, 2^7720133 is an apocalyptic number.

It is an amenable number.

7720133 is a deficient number, since it is larger than the sum of its proper divisors (79687).

7720133 is an equidigital number, since it uses as much as digits as its factorization.

7720133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79686.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 7720133 is about 2778.5127316606. The cubic root of 7720133 is about 197.6400374132.

The spelling of 7720133 in words is "seven million, seven hundred twenty thousand, one hundred thirty-three".