7133209 has 4 divisors (see below), whose sum is σ = 7189504. Its totient is φ = 7076916.

The previous prime is 7133207. The next prime is 7133219. The reversal of 7133209 is 9023317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9023317 = 503 ⋅17939.

It is a cyclic number.

It is not a de Polignac number, because 7133209 - 2¹ = 7133207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7133201) 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, 27957 + ... + 28210.

It is an arithmetic number, because the mean of its divisors is an integer number (1797376).

Almost surely, 2^7133209 is an apocalyptic number.

It is an amenable number.

7133209 is a deficient number, since it is larger than the sum of its proper divisors (56295).

7133209 is a wasteful number, since it uses less digits than its factorization.

7133209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56294.

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

The square root of 7133209 is about 2670.8068069406. The cubic root of 7133209 is about 192.4989284249.

The spelling of 7133209 in words is "seven million, one hundred thirty-three thousand, two hundred nine".