7173247621 has 2 divisors, whose sum is σ = 7173247622. Its totient is φ = 7173247620.

The previous prime is 7173247591. The next prime is 7173247639. The reversal of 7173247621 is 1267423717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5790449025 + 1382798596 = 76095^2 + 37186^2 .

It is a cyclic number.

It is not a de Polignac number, because 7173247621 - 2⁷ = 7173247493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7173247661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3586623810 + 3586623811.

It is an arithmetic number, because the mean of its divisors is an integer number (3586623811).

Almost surely, 2^7173247621 is an apocalyptic number.

It is an amenable number.

7173247621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7173247621 is an equidigital number, since it uses as much as digits as its factorization.

7173247621 is an evil number, because the sum of its binary digits is even.

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

The square root of 7173247621 is about 84695.0271326481. The cubic root of 7173247621 is about 1928.5842141691.

The spelling of 7173247621 in words is "seven billion, one hundred seventy-three million, two hundred forty-seven thousand, six hundred twenty-one".