208913101 has 4 divisors (see below), whose sum is σ = 209299804. Its totient is φ = 208526400.

The previous prime is 208913099. The next prime is 208913141. The reversal of 208913101 is 101319802.

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 46376100 + 162537001 = 6810^2 + 12749^2 .

It is a cyclic number.

It is not a de Polignac number, because 208913101 - 2¹ = 208913099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208913141) 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, 192540 + ... + 193621.

It is an arithmetic number, because the mean of its divisors is an integer number (52324951).

Almost surely, 2^208913101 is an apocalyptic number.

It is an amenable number.

208913101 is a deficient number, since it is larger than the sum of its proper divisors (386703).

208913101 is an equidigital number, since it uses as much as digits as its factorization.

208913101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386702.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 208913101 is about 14453.8265175697. The cubic root of 208913101 is about 593.3649538830.

The spelling of 208913101 in words is "two hundred eight million, nine hundred thirteen thousand, one hundred one".