208849997 has 2 divisors, whose sum is σ = 208849998. Its totient is φ = 208849996.

The previous prime is 208849987. The next prime is 208850003. The reversal of 208849997 is 799948802.

It is a happy number.

208849997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206381956 + 2468041 = 14366^2 + 1571^2 .

It is a cyclic number.

It is not a de Polignac number, because 208849997 - 2¹⁶ = 208784461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208849987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104424998 + 104424999.

It is an arithmetic number, because the mean of its divisors is an integer number (104424999).

Almost surely, 2^208849997 is an apocalyptic number.

It is an amenable number.

208849997 is a deficient number, since it is larger than the sum of its proper divisors (1).

208849997 is an equidigital number, since it uses as much as digits as its factorization.

208849997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 208849997 is about 14451.6434013575. The cubic root of 208849997 is about 593.3052042031.

The spelling of 208849997 in words is "two hundred eight million, eight hundred forty-nine thousand, nine hundred ninety-seven".