997091 has 2 divisors, whose sum is σ = 997092. Its totient is φ = 997090.

The previous prime is 997081. The next prime is 997097. The reversal of 997091 is 190799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997091 - 2¹⁰ = 996067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997097) 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, 498545 + 498546.

It is an arithmetic number, because the mean of its divisors is an integer number (498546).

2⁹⁹⁷⁰⁹¹ is an apocalyptic number.

997091 is a deficient number, since it is larger than the sum of its proper divisors (1).

997091 is an equidigital number, since it uses as much as digits as its factorization.

997091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 997091 is about 998.5444406735. The cubic root of 997091 is about 99.9029391557.

The spelling of 997091 in words is "nine hundred ninety-seven thousand, ninety-one".