997211297 has 2 divisors, whose sum is σ = 997211298. Its totient is φ = 997211296.

The previous prime is 997211291. The next prime is 997211329. The reversal of 997211297 is 792112799.

997211297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941201041 + 56010256 = 30679^2 + 7484^2 .

It is an emirp because it is prime and its reverse (792112799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997211297 - 2²⁰ = 996162721 is a prime.

It is not a weakly prime, because it can be changed into another prime (997211291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498605648 + 498605649.

It is an arithmetic number, because the mean of its divisors is an integer number (498605649).

Almost surely, 2^997211297 is an apocalyptic number.

It is an amenable number.

997211297 is a deficient number, since it is larger than the sum of its proper divisors (1).

997211297 is an equidigital number, since it uses as much as digits as its factorization.

997211297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 47.

The square root of 997211297 is about 31578.6525520010. The cubic root of 997211297 is about 999.0695668961.

The spelling of 997211297 in words is "nine hundred ninety-seven million, two hundred eleven thousand, two hundred ninety-seven".