7148728393 has 2 divisors, whose sum is σ = 7148728394. Its totient is φ = 7148728392.

The previous prime is 7148728387. The next prime is 7148728421. The reversal of 7148728393 is 3938278417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6051595264 + 1097133129 = 77792^2 + 33123^2 .

It is a cyclic number.

It is not a de Polignac number, because 7148728393 - 2⁹ = 7148727881 is a prime.

It is a super-2 number, since 2×7148728393² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7148728393.

It is not a weakly prime, because it can be changed into another prime (7148728313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3574364196 + 3574364197.

It is an arithmetic number, because the mean of its divisors is an integer number (3574364197).

Almost surely, 2^7148728393 is an apocalyptic number.

It is an amenable number.

7148728393 is a deficient number, since it is larger than the sum of its proper divisors (1).

7148728393 is an equidigital number, since it uses as much as digits as its factorization.

7148728393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 7148728393 is about 84550.1531222741. The cubic root of 7148728393 is about 1926.3843097666.

The spelling of 7148728393 in words is "seven billion, one hundred forty-eight million, seven hundred twenty-eight thousand, three hundred ninety-three".