9997747 has 2 divisors, whose sum is σ = 9997748. Its totient is φ = 9997746.

The previous prime is 9997739. The next prime is 9997753. The reversal of 9997747 is 7477999.

9997747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (7477999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9997747 - 2³ = 9997739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9997694 and 9997703.

It is not a weakly prime, because it can be changed into another prime (9997777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998873 + 4998874.

It is an arithmetic number, because the mean of its divisors is an integer number (4998874).

Almost surely, 2^9997747 is an apocalyptic number.

9997747 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997747 is an equidigital number, since it uses as much as digits as its factorization.

9997747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 52.

The square root of 9997747 is about 3161.9214095230. The cubic root of 9997747 is about 215.4272879834.

The spelling of 9997747 in words is "nine million, nine hundred ninety-seven thousand, seven hundred forty-seven".