997211329 has 2 divisors, whose sum is σ = 997211330. Its totient is φ = 997211328.

The previous prime is 997211297. The next prime is 997211353. The reversal of 997211329 is 923112799.

997211329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863184400 + 134026929 = 29380^2 + 11577^2 .

It is a cyclic number.

It is not a de Polignac number, because 997211329 - 2⁵ = 997211297 is a prime.

It is not a weakly prime, because it can be changed into another prime (997211359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498605664 + 498605665.

It is an arithmetic number, because the mean of its divisors is an integer number (498605665).

Almost surely, 2^997211329 is an apocalyptic number.

It is an amenable number.

997211329 is a deficient number, since it is larger than the sum of its proper divisors (1).

997211329 is an equidigital number, since it uses as much as digits as its factorization.

997211329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 997211329 is about 31578.6530586724. The cubic root of 997211329 is about 999.0695775826.

The spelling of 997211329 in words is "nine hundred ninety-seven million, two hundred eleven thousand, three hundred twenty-nine".