9997517 has 2 divisors, whose sum is σ = 9997518.
Its totient is φ = 9997516.
The previous prime is 9997483. The next prime is 9997523. The reversal of 9997517 is 7157999.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9821956 + 175561 = 3134^2 + 419^2
It is an emirp because it is prime and its reverse (7157999) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9997517 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 (9997577) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998758 + 4998759.
It is an arithmetic number, because the mean of its divisors is an integer number (4998759).
Almost surely, 29997517 is an apocalyptic number.
It is an amenable number.
9997517 is a deficient number, since it is larger than the sum of its proper divisors (1).
9997517 is an equidigital number, since it uses as much as digits as its factorization.
9997517 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 178605, while the sum is 47.
The square root of 9997517 is about 3161.8850390234.
The cubic root of 9997517 is about 215.4256359893.
The spelling of 9997517 in words is "nine million, nine hundred ninety-seven thousand, five hundred seventeen".