7645997393 has 2 divisors, whose sum is σ = 7645997394. Its totient is φ = 7645997392.

The previous prime is 7645997389. The next prime is 7645997507. The reversal of 7645997393 is 3937995467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4694031169 + 2951966224 = 68513^2 + 54332^2 .

It is a cyclic number.

It is not a de Polignac number, because 7645997393 - 2² = 7645997389 is a prime.

It is a super-2 number, since 2×7645997393² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7645997363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822998696 + 3822998697.

It is an arithmetic number, because the mean of its divisors is an integer number (3822998697).

Almost surely, 2^7645997393 is an apocalyptic number.

It is an amenable number.

7645997393 is a deficient number, since it is larger than the sum of its proper divisors (1).

7645997393 is an equidigital number, since it uses as much as digits as its factorization.

7645997393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38578680, while the sum is 62.

The square root of 7645997393 is about 87441.3940476706. The cubic root of 7645997393 is about 1970.0536281106.

The spelling of 7645997393 in words is "seven billion, six hundred forty-five million, nine hundred ninety-seven thousand, three hundred ninety-three".