7240720673 has 2 divisors, whose sum is σ = 7240720674. Its totient is φ = 7240720672.

The previous prime is 7240720649. The next prime is 7240720681. The reversal of 7240720673 is 3760270427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7060704784 + 180015889 = 84028^2 + 13417^2 .

It is an emirp because it is prime and its reverse (3760270427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7240720673 - 2¹² = 7240716577 is a prime.

It is not a weakly prime, because it can be changed into another prime (7240720693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620360336 + 3620360337.

It is an arithmetic number, because the mean of its divisors is an integer number (3620360337).

Almost surely, 2^7240720673 is an apocalyptic number.

It is an amenable number.

7240720673 is a deficient number, since it is larger than the sum of its proper divisors (1).

7240720673 is an equidigital number, since it uses as much as digits as its factorization.

7240720673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 38.

The square root of 7240720673 is about 85092.4242985238. The cubic root of 7240720673 is about 1934.6122406492.

The spelling of 7240720673 in words is "seven billion, two hundred forty million, seven hundred twenty thousand, six hundred seventy-three".