7281893 has 2 divisors, whose sum is σ = 7281894. Its totient is φ = 7281892.

The previous prime is 7281889. The next prime is 7281913. The reversal of 7281893 is 3981827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4919524 + 2362369 = 2218^2 + 1537^2 .

It is an emirp because it is prime and its reverse (3981827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7281893 - 2² = 7281889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7281803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640946 + 3640947.

It is an arithmetic number, because the mean of its divisors is an integer number (3640947).

Almost surely, 2^7281893 is an apocalyptic number.

It is an amenable number.

7281893 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281893 is an equidigital number, since it uses as much as digits as its factorization.

7281893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 7281893 is about 2698.4982860843. The cubic root of 7281893 is about 193.8272188909.

The spelling of 7281893 in words is "seven million, two hundred eighty-one thousand, eight hundred ninety-three".