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997111 is a prime number
BaseRepresentation
bin11110011011011110111
31212122210001
43303123313
5223401421
633212131
711322013
oct3633367
91778701
10997111
11621165
12401047
1328bb0b
141bd543
1514a691
hexf36f7

997111 has 2 divisors, whose sum is σ = 997112. Its totient is φ = 997110.

The previous prime is 997109. The next prime is 997121. The reversal of 997111 is 111799.

It is a weak prime.

It is an emirp because it is prime and its reverse (111799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997111 - 21 = 997109 is a prime.

Together with 997109, it forms a pair of twin primes.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 997111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498555 + 498556.

It is an arithmetic number, because the mean of its divisors is an integer number (498556).

2997111 is an apocalyptic number.

997111 is a deficient number, since it is larger than the sum of its proper divisors (1).

997111 is an equidigital number, since it uses as much as digits as its factorization.

997111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567, while the sum is 28.

The square root of 997111 is about 998.5544552001. The cubic root of 997111 is about 99.9036071140.

The spelling of 997111 in words is "nine hundred ninety-seven thousand, one hundred eleven".