7223809 has 2 divisors, whose sum is σ = 7223810. Its totient is φ = 7223808.

The previous prime is 7223807. The next prime is 7223833. The reversal of 7223809 is 9083227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6110784 + 1113025 = 2472^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 7223809 - 2¹ = 7223807 is a prime.

Together with 7223807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7223807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611904 + 3611905.

It is an arithmetic number, because the mean of its divisors is an integer number (3611905).

Almost surely, 2^7223809 is an apocalyptic number.

It is an amenable number.

7223809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7223809 is an equidigital number, since it uses as much as digits as its factorization.

7223809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 7223809 is about 2687.7144565597. The cubic root of 7223809 is about 193.3104884488.

The spelling of 7223809 in words is "seven million, two hundred twenty-three thousand, eight hundred nine".