208969199 has 2 divisors, whose sum is σ = 208969200. Its totient is φ = 208969198.

The previous prime is 208969193. The next prime is 208969231. The reversal of 208969199 is 991969802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208969199 - 2¹² = 208965103 is a prime.

It is a super-2 number, since 2×208969199² = 87336252261403202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208969199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208969193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104484599 + 104484600.

It is an arithmetic number, because the mean of its divisors is an integer number (104484600).

Almost surely, 2^208969199 is an apocalyptic number.

208969199 is a deficient number, since it is larger than the sum of its proper divisors (1).

208969199 is an equidigital number, since it uses as much as digits as its factorization.

208969199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 53.

The square root of 208969199 is about 14455.7669806897. The cubic root of 208969199 is about 593.4180598683.

The spelling of 208969199 in words is "two hundred eight million, nine hundred sixty-nine thousand, one hundred ninety-nine".