210497117 has 2 divisors, whose sum is σ = 210497118. Its totient is φ = 210497116.

The previous prime is 210497069. The next prime is 210497129. The reversal of 210497117 is 711794012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192127321 + 18369796 = 13861^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 210497117 - 2¹⁴ = 210480733 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 (210497017) 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, 105248558 + 105248559.

It is an arithmetic number, because the mean of its divisors is an integer number (105248559).

Almost surely, 2^210497117 is an apocalyptic number.

It is an amenable number.

210497117 is a deficient number, since it is larger than the sum of its proper divisors (1).

210497117 is an equidigital number, since it uses as much as digits as its factorization.

210497117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 210497117 is about 14508.5187734655. The cubic root of 210497117 is about 594.8608454563.

The spelling of 210497117 in words is "two hundred ten million, four hundred ninety-seven thousand, one hundred seventeen".