217980107 has 2 divisors, whose sum is σ = 217980108. Its totient is φ = 217980106.

The previous prime is 217980101. The next prime is 217980109. The reversal of 217980107 is 701089712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217980107 - 2¹⁴ = 217963723 is a prime.

Together with 217980109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (217980101) 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, 108990053 + 108990054.

It is an arithmetic number, because the mean of its divisors is an integer number (108990054).

Almost surely, 2^217980107 is an apocalyptic number.

217980107 is a deficient number, since it is larger than the sum of its proper divisors (1).

217980107 is an equidigital number, since it uses as much as digits as its factorization.

217980107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 217980107 is about 14764.1493828801. The cubic root of 217980107 is about 601.8278583094.

The spelling of 217980107 in words is "two hundred seventeen million, nine hundred eighty thousand, one hundred seven".