7022809 has 4 divisors (see below), whose sum is σ = 7038900. Its totient is φ = 7006720.

The previous prime is 7022791. The next prime is 7022831. The reversal of 7022809 is 9082207.

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 6110784 + 912025 = 2472^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 7022809 - 2⁵ = 7022777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7022839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7372 + ... + 8269.

It is an arithmetic number, because the mean of its divisors is an integer number (1759725).

Almost surely, 2^7022809 is an apocalyptic number.

It is an amenable number.

7022809 is a deficient number, since it is larger than the sum of its proper divisors (16091).

7022809 is a wasteful number, since it uses less digits than its factorization.

7022809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16090.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7022809 is about 2650.0583012455. The cubic root of 7022809 is about 191.5006646692.

The spelling of 7022809 in words is "seven million, twenty-two thousand, eight hundred nine".