7253770721 has 2 divisors, whose sum is σ = 7253770722. Its totient is φ = 7253770720.

The previous prime is 7253770703. The next prime is 7253770763. The reversal of 7253770721 is 1270773527.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6878380096 + 375390625 = 82936^2 + 19375^2 .

It is a cyclic number.

It is not a de Polignac number, because 7253770721 - 2¹⁰ = 7253769697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7253170721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3626885360 + 3626885361.

It is an arithmetic number, because the mean of its divisors is an integer number (3626885361).

Almost surely, 2^7253770721 is an apocalyptic number.

It is an amenable number.

7253770721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7253770721 is an equidigital number, since it uses as much as digits as its factorization.

7253770721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144060, while the sum is 41.

The square root of 7253770721 is about 85169.0713874467. The cubic root of 7253770721 is about 1935.7738022935.

The spelling of 7253770721 in words is "seven billion, two hundred fifty-three million, seven hundred seventy thousand, seven hundred twenty-one".