997081 has 2 divisors, whose sum is σ = 997082. Its totient is φ = 997080.

The previous prime is 997069. The next prime is 997091. The reversal of 997081 is 180799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 7056 = 995^2 + 84^2 .

It is an emirp because it is prime and its reverse (180799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997081 - 2⁷ = 996953 is a prime.

It is a super-2 number, since 2×997081² = 1988341041122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (997001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498540 + 498541.

It is an arithmetic number, because the mean of its divisors is an integer number (498541).

2⁹⁹⁷⁰⁸¹ is an apocalyptic number.

It is an amenable number.

997081 is a deficient number, since it is larger than the sum of its proper divisors (1).

997081 is an equidigital number, since it uses as much as digits as its factorization.

997081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 997081 is about 998.5394333726. The cubic root of 997081 is about 99.9026051733.

The spelling of 997081 in words is "nine hundred ninety-seven thousand, eighty-one".