208868194441 has 3 divisors (see below), whose sum is σ = 208868651463. Its totient is φ = 208867737420.

The previous prime is 208868194429. The next prime is 208868194471. The reversal of 208868194441 is 144491868802.

The square root of 208868194441 is 457021.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 25290222841 + 183577971600 = 159029^2 + 428460^2 .

It is not a de Polignac number, because 208868194441 - 2¹⁵ = 208868161673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208868194471) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 228511 + ... + 685531.

It is an arithmetic number, because the mean of its divisors is an integer number (69622883821).

Almost surely, 2^208868194441 is an apocalyptic number.

208868194441 is the 457021-st square number.

208868194441 is the 228511-st centered octagonal number.

It is an amenable number.

208868194441 is a deficient number, since it is larger than the sum of its proper divisors (457022).

208868194441 is an frugal number, since it uses more digits than its factorization.

208868194441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914042 (or 457021 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 208868194441 in words is "two hundred eight billion, eight hundred sixty-eight million, one hundred ninety-four thousand, four hundred forty-one".