7278673 has 4 divisors (see below), whose sum is σ = 7331940. Its totient is φ = 7225408.

The previous prime is 7278659. The next prime is 7278721. The reversal of 7278673 is 3768727.

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 5461569 + 1817104 = 2337^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 7278673 - 2⁵ = 7278641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7278613) 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, 26428 + ... + 26701.

It is an arithmetic number, because the mean of its divisors is an integer number (1832985).

Almost surely, 2^7278673 is an apocalyptic number.

It is an amenable number.

7278673 is a deficient number, since it is larger than the sum of its proper divisors (53267).

7278673 is a wasteful number, since it uses less digits than its factorization.

7278673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53266.

The product of its digits is 98784, while the sum is 40.

The square root of 7278673 is about 2697.9015919785. The cubic root of 7278673 is about 193.7986450177.

The spelling of 7278673 in words is "seven million, two hundred seventy-eight thousand, six hundred seventy-three".