7273813 has 4 divisors (see below), whose sum is σ = 7286220. Its totient is φ = 7261408.

The previous prime is 7273811. The next prime is 7273817. The reversal of 7273813 is 3183727.

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 208849 + 7064964 = 457^2 + 2658^2 .

It is a cyclic number.

It is not a de Polignac number, because 7273813 - 2¹ = 7273811 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7273811) 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, 5278 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (1821555).

Almost surely, 2^7273813 is an apocalyptic number.

It is an amenable number.

7273813 is a deficient number, since it is larger than the sum of its proper divisors (12407).

7273813 is a wasteful number, since it uses less digits than its factorization.

7273813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406.

The product of its digits is 7056, while the sum is 31.

The square root of 7273813 is about 2697.0007415646. Note that the first 3 decimals coincide. The cubic root of 7273813 is about 193.7555020290.

The spelling of 7273813 in words is "seven million, two hundred seventy-three thousand, eight hundred thirteen".