9999397 has 2 divisors, whose sum is σ = 9999398.
Its totient is φ = 9999396.
The previous prime is 9999347. The next prime is 9999401. The reversal of 9999397 is 7939999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9235521 + 763876 = 3039^2 + 874^2
It is a cyclic number.
It is not a de Polignac number, because 9999397 - 211 = 9997349 is a prime.
It is a Chen prime.
9999397 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9999317) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999698 + 4999699.
It is an arithmetic number, because the mean of its divisors is an integer number (4999699).
Almost surely, 29999397 is an apocalyptic number.
It is an amenable number.
9999397 is a deficient number, since it is larger than the sum of its proper divisors (1).
9999397 is an equidigital number, since it uses as much as digits as its factorization.
9999397 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1240029, while the sum is 55.
The square root of 9999397 is about 3162.1823160596.
The cubic root of 9999397 is about 215.4391385024.
The spelling of 9999397 in words is "nine million, nine hundred ninety-nine thousand, three hundred ninety-seven".