997793 has 2 divisors, whose sum is σ = 997794. Its totient is φ = 997792.
The previous prime is 997783. The next prime is 997807. The reversal of 997793 is 397799.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 954529 + 43264 = 977^2 + 208^2 .
It is an emirp because it is prime and its reverse (397799) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 997793 - 216 = 932257 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (997783) 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, 498896 + 498897.
It is an arithmetic number, because the mean of its divisors is an integer number (498897).
2997793 is an apocalyptic number.
It is an amenable number.
997793 is a deficient number, since it is larger than the sum of its proper divisors (1).
997793 is an equidigital number, since it uses as much as digits as its factorization.
997793 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 107163, while the sum is 44.
The square root of 997793 is about 998.8958904711. The cubic root of 997793 is about 99.9263791463.
The spelling of 997793 in words is "nine hundred ninety-seven thousand, seven hundred ninety-three".
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