208213469 has 2 divisors, whose sum is σ = 208213470. Its totient is φ = 208213468.

The previous prime is 208213463. The next prime is 208213471. The reversal of 208213469 is 964312802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181225444 + 26988025 = 13462^2 + 5195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208213469 is a prime.

It is a super-2 number, since 2×208213469² = 86705697346027922, which contains 22 as substring.

Together with 208213471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208213463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104106734 + 104106735.

It is an arithmetic number, because the mean of its divisors is an integer number (104106735).

Almost surely, 2^208213469 is an apocalyptic number.

It is an amenable number.

208213469 is a deficient number, since it is larger than the sum of its proper divisors (1).

208213469 is an equidigital number, since it uses as much as digits as its factorization.

208213469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 208213469 is about 14429.6039100178. The cubic root of 208213469 is about 592.7018370320.

It can be divided in two parts, 2082 and 13469, that added together give a palindrome (15551).

The spelling of 208213469 in words is "two hundred eight million, two hundred thirteen thousand, four hundred sixty-nine".