7472521729 has 2 divisors, whose sum is σ = 7472521730. Its totient is φ = 7472521728.

The previous prime is 7472521699. The next prime is 7472521741. The reversal of 7472521729 is 9271252747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6622216129 + 850305600 = 81377^2 + 29160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7472521729 is a prime.

It is not a weakly prime, because it can be changed into another prime (7472521769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3736260864 + 3736260865.

It is an arithmetic number, because the mean of its divisors is an integer number (3736260865).

Almost surely, 2^7472521729 is an apocalyptic number.

It is an amenable number.

7472521729 is a deficient number, since it is larger than the sum of its proper divisors (1).

7472521729 is an equidigital number, since it uses as much as digits as its factorization.

7472521729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 46.

The square root of 7472521729 is about 86443.7489295785. The cubic root of 7472521729 is about 1955.0403664238.

The spelling of 7472521729 in words is "seven billion, four hundred seventy-two million, five hundred twenty-one thousand, seven hundred twenty-nine".