997441117 has 2 divisors, whose sum is σ = 997441118. Its totient is φ = 997441116.

The previous prime is 997441091. The next prime is 997441171. The reversal of 997441117 is 711144799.

Together with next prime (997441171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549949401 + 447491716 = 23451^2 + 21154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997441117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997441517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498720558 + 498720559.

It is an arithmetic number, because the mean of its divisors is an integer number (498720559).

Almost surely, 2^997441117 is an apocalyptic number.

It is an amenable number.

997441117 is a deficient number, since it is larger than the sum of its proper divisors (1).

997441117 is an equidigital number, since it uses as much as digits as its factorization.

997441117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 43.

The square root of 997441117 is about 31582.2911930088. The cubic root of 997441117 is about 999.1463104215.

The spelling of 997441117 in words is "nine hundred ninety-seven million, four hundred forty-one thousand, one hundred seventeen".