208149243 has 8 divisors (see below), whose sum is σ = 277601856. Its totient is φ = 138731400.

The previous prime is 208149233. The next prime is 208149247. The reversal of 208149243 is 342941802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208149243 - 2¹⁰ = 208148219 is a prime.

It is a super-2 number, since 2×208149243² = 86652214722946098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208149247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13048 + ... + 24218.

It is an arithmetic number, because the mean of its divisors is an integer number (34700232).

Almost surely, 2^208149243 is an apocalyptic number.

208149243 is a deficient number, since it is larger than the sum of its proper divisors (69452613).

208149243 is a wasteful number, since it uses less digits than its factorization.

208149243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17385.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 208149243 is about 14427.3782441579. The cubic root of 208149243 is about 592.6408887127.

The spelling of 208149243 in words is "two hundred eight million, one hundred forty-nine thousand, two hundred forty-three".