7221673 has 4 divisors (see below), whose sum is σ = 7227220. Its totient is φ = 7216128.

The previous prime is 7221661. The next prime is 7221689. The reversal of 7221673 is 3761227.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 4439449 = 1668^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221673 - 2⁹ = 7221161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221173) 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, 361 + ... + 3817.

It is an arithmetic number, because the mean of its divisors is an integer number (1806805).

Almost surely, 2^7221673 is an apocalyptic number.

It is an amenable number.

7221673 is a deficient number, since it is larger than the sum of its proper divisors (5547).

7221673 is a wasteful number, since it uses less digits than its factorization.

7221673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546.

The product of its digits is 3528, while the sum is 28.

The square root of 7221673 is about 2687.3170635413. The cubic root of 7221673 is about 193.2914333165.

The spelling of 7221673 in words is "seven million, two hundred twenty-one thousand, six hundred seventy-three".