7520721347 has 2 divisors, whose sum is σ = 7520721348. Its totient is φ = 7520721346.

The previous prime is 7520721301. The next prime is 7520721349. The reversal of 7520721347 is 7431270257.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7520721347 - 2²⁶ = 7453612483 is a prime.

It is a super-2 number, since 2×7520721347² (a number of 21 digits) contains 22 as substring.

Together with 7520721349, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7520721347.

It is not a weakly prime, because it can be changed into another prime (7520721349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760360673 + 3760360674.

It is an arithmetic number, because the mean of its divisors is an integer number (3760360674).

Almost surely, 2^7520721347 is an apocalyptic number.

7520721347 is a deficient number, since it is larger than the sum of its proper divisors (1).

7520721347 is an equidigital number, since it uses as much as digits as its factorization.

7520721347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 7520721347 is about 86722.0926119752. The cubic root of 7520721347 is about 1959.2348591783.

The spelling of 7520721347 in words is "seven billion, five hundred twenty million, seven hundred twenty-one thousand, three hundred forty-seven".