7223913 has 12 divisors (see below), whose sum is σ = 10689588. Its totient is φ = 4698240.

The previous prime is 7223911. The next prime is 7223921. The reversal of 7223913 is 3193227.

It can be written as a sum of positive squares in 2 ways, for example, as 3583449 + 3640464 = 1893^2 + 1908^2 .

It is not a de Polignac number, because 7223913 - 2¹ = 7223911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7223911) 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 11 ways as a sum of consecutive naturals, for example, 9420 + ... + 10157.

It is an arithmetic number, because the mean of its divisors is an integer number (890799).

Almost surely, 2^7223913 is an apocalyptic number.

It is an amenable number.

7223913 is a deficient number, since it is larger than the sum of its proper divisors (3465675).

7223913 is a wasteful number, since it uses less digits than its factorization.

7223913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19624 (or 19621 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 7223913 is about 2687.7338037834. The cubic root of 7223913 is about 193.3114161309.

The spelling of 7223913 in words is "seven million, two hundred twenty-three thousand, nine hundred thirteen".