997024397 has 2 divisors, whose sum is σ = 997024398. Its totient is φ = 997024396.

The previous prime is 997024349. The next prime is 997024403. The reversal of 997024397 is 793420799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679436356 + 317588041 = 26066^2 + 17821^2 .

It is a cyclic number.

It is not a de Polignac number, because 997024397 - 2⁸ = 997024141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997024307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498512198 + 498512199.

It is an arithmetic number, because the mean of its divisors is an integer number (498512199).

Almost surely, 2^997024397 is an apocalyptic number.

It is an amenable number.

997024397 is a deficient number, since it is larger than the sum of its proper divisors (1).

997024397 is an equidigital number, since it uses as much as digits as its factorization.

997024397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 997024397 is about 31575.6931357017. The cubic root of 997024397 is about 999.0071469023.

The spelling of 997024397 in words is "nine hundred ninety-seven million, twenty-four thousand, three hundred ninety-seven".