997071617 has 2 divisors, whose sum is σ = 997071618. Its totient is φ = 997071616.

The previous prime is 997071589. The next prime is 997071629. The reversal of 997071617 is 716170799.

997071617 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., 827655361 + 169416256 = 28769^2 + 13016^2 .

It is a cyclic number.

It is not a de Polignac number, because 997071617 - 2⁶ = 997071553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997071017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498535808 + 498535809.

It is an arithmetic number, because the mean of its divisors is an integer number (498535809).

Almost surely, 2^997071617 is an apocalyptic number.

It is an amenable number.

997071617 is a deficient number, since it is larger than the sum of its proper divisors (1).

997071617 is an equidigital number, since it uses as much as digits as its factorization.

997071617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 166698, while the sum is 47.

The square root of 997071617 is about 31576.4408539025. The cubic root of 997071617 is about 999.0229179549.

The spelling of 997071617 in words is "nine hundred ninety-seven million, seventy-one thousand, six hundred seventeen".