208224869 has 2 divisors, whose sum is σ = 208224870. Its totient is φ = 208224868.

The previous prime is 208224859. The next prime is 208224871. The reversal of 208224869 is 968422802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188732644 + 19492225 = 13738^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 208224869 - 2⁴ = 208224853 is a prime.

It is a super-2 number, since 2×208224869² = 86715192140134322, which contains 22 as substring.

Together with 208224871, 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 (208224829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104112434 + 104112435.

It is an arithmetic number, because the mean of its divisors is an integer number (104112435).

Almost surely, 2^208224869 is an apocalyptic number.

It is an amenable number.

208224869 is a deficient number, since it is larger than the sum of its proper divisors (1).

208224869 is an equidigital number, since it uses as much as digits as its factorization.

208224869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 208224869 is about 14429.9989258489. The cubic root of 208224869 is about 592.7126539397.

The spelling of 208224869 in words is "two hundred eight million, two hundred twenty-four thousand, eight hundred sixty-nine".