208214969 has 2 divisors, whose sum is σ = 208214970. Its totient is φ = 208214968.

The previous prime is 208214959. The next prime is 208214971. The reversal of 208214969 is 969412802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194965369 + 13249600 = 13963^2 + 3640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208214969 is a prime.

It is a super-2 number, since 2×208214969² = 86706946631341922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 208214971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (208214959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104107484 + 104107485.

It is an arithmetic number, because the mean of its divisors is an integer number (104107485).

Almost surely, 2^208214969 is an apocalyptic number.

It is an amenable number.

208214969 is a deficient number, since it is larger than the sum of its proper divisors (1).

208214969 is an equidigital number, since it uses as much as digits as its factorization.

208214969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 208214969 is about 14429.6558864028. The cubic root of 208214969 is about 592.7032603318.

The spelling of 208214969 in words is "two hundred eight million, two hundred fourteen thousand, nine hundred sixty-nine".