208914289 has 4 divisors (see below), whose sum is σ = 216118260. Its totient is φ = 201710320.

The previous prime is 208914283. The next prime is 208914317. The reversal of 208914289 is 982419802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100400400 + 108513889 = 10020^2 + 10417^2 .

It is a cyclic number.

It is not a de Polignac number, because 208914289 - 2⁵ = 208914257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208914283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3601942 + ... + 3601999.

It is an arithmetic number, because the mean of its divisors is an integer number (54029565).

Almost surely, 2^208914289 is an apocalyptic number.

208914289 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

208914289 is a deficient number, since it is larger than the sum of its proper divisors (7203971).

208914289 is an equidigital number, since it uses as much as digits as its factorization.

208914289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203970.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 208914289 is about 14453.8676138949. The cubic root of 208914289 is about 593.3660786190.

The spelling of 208914289 in words is "two hundred eight million, nine hundred fourteen thousand, two hundred eighty-nine".