7281913 has 2 divisors, whose sum is σ = 7281914. Its totient is φ = 7281912.

The previous prime is 7281893. The next prime is 7281917. The reversal of 7281913 is 3191827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 480249 = 2608^2 + 693^2 .

It is a cyclic number.

It is not a de Polignac number, because 7281913 - 2⁵ = 7281881 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7281917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640956 + 3640957.

It is an arithmetic number, because the mean of its divisors is an integer number (3640957).

Almost surely, 2^7281913 is an apocalyptic number.

It is an amenable number.

7281913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281913 is an equidigital number, since it uses as much as digits as its factorization.

7281913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 7281913 is about 2698.5019918466. The cubic root of 7281913 is about 193.8273963420.

The spelling of 7281913 in words is "seven million, two hundred eighty-one thousand, nine hundred thirteen".