7289530207621 has 2 divisors, whose sum is σ = 7289530207622. Its totient is φ = 7289530207620.

The previous prime is 7289530207549. The next prime is 7289530207679. The reversal of 7289530207621 is 1267020359827.

It is a happy number.

7289530207621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5831500522500 + 1458029685121 = 2414850^2 + 1207489^2 .

It is a cyclic number.

It is not a de Polignac number, because 7289530207621 - 2¹³ = 7289530199429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7289530207321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3644765103810 + 3644765103811.

It is an arithmetic number, because the mean of its divisors is an integer number (3644765103811).

Almost surely, 2^{7289530207621} is an apocalyptic number.

It is an amenable number.

7289530207621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7289530207621 is an equidigital number, since it uses as much as digits as its factorization.

7289530207621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

Subtracting from 7289530207621 its sum of digits (52), we obtain a square (7289530207569 = 2699913²).

The spelling of 7289530207621 in words is "seven trillion, two hundred eighty-nine billion, five hundred thirty million, two hundred seven thousand, six hundred twenty-one".