208948921 has 8 divisors (see below), whose sum is σ = 221490720. Its totient is φ = 196435008.

The previous prime is 208948919. The next prime is 208948937. The reversal of 208948921 is 129849802.

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

It is a cyclic number.

It is not a de Polignac number, because 208948921 - 2¹ = 208948919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208948991) 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, 9610 + ... + 22588.

It is an arithmetic number, because the mean of its divisors is an integer number (27686340).

Almost surely, 2^208948921 is an apocalyptic number.

It is an amenable number.

208948921 is a deficient number, since it is larger than the sum of its proper divisors (12541799).

208948921 is a wasteful number, since it uses less digits than its factorization.

208948921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13943.

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

The square root of 208948921 is about 14455.0655826945. The cubic root of 208948921 is about 593.3988645025.

The spelling of 208948921 in words is "two hundred eight million, nine hundred forty-eight thousand, nine hundred twenty-one".