9997927 has 2 divisors, whose sum is σ = 9997928. Its totient is φ = 9997926.

The previous prime is 9997913. The next prime is 9997937. The reversal of 9997927 is 7297999.

9997927 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997927 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9997937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998963 + 4998964.

It is an arithmetic number, because the mean of its divisors is an integer number (4998964).

Almost surely, 2^9997927 is an apocalyptic number.

9997927 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997927 is an equidigital number, since it uses as much as digits as its factorization.

9997927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 52.

The square root of 9997927 is about 3161.9498731005. The cubic root of 9997927 is about 215.4285808307.

The spelling of 9997927 in words is "nine million, nine hundred ninety-seven thousand, nine hundred twenty-seven".