7040209 has 4 divisors (see below), whose sum is σ = 7680240. Its totient is φ = 6400180.

The previous prime is 7040197. The next prime is 7040213. The reversal of 7040209 is 9020407.

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: 9020407 = 11 ⋅820037.

It is a cyclic number.

It is not a de Polignac number, because 7040209 - 2⁷ = 7040081 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7040209.

It is not an unprimeable number, because it can be changed into a prime (7040269) 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, 319999 + ... + 320020.

It is an arithmetic number, because the mean of its divisors is an integer number (1920060).

Almost surely, 2^7040209 is an apocalyptic number.

It is an amenable number.

7040209 is a deficient number, since it is larger than the sum of its proper divisors (640031).

7040209 is a wasteful number, since it uses less digits than its factorization.

7040209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640030.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7040209 is about 2653.3392169114. The cubic root of 7040209 is about 191.6586908674.

The spelling of 7040209 in words is "seven million, forty thousand, two hundred nine".