208901101249 has 3 divisors (see below), whose sum is σ = 208901558307. Its totient is φ = 208900644192.

The previous prime is 208901101243. The next prime is 208901101261. The reversal of 208901101249 is 942101109802.

The square root of 208901101249 is 457057.

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

208901101249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 208753041025 + 148060224 = 456895^2 + 12168^2 .

It is not a de Polignac number, because 208901101249 - 2⁷ = 208901101121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208901101243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 228529 + ... + 685585.

It is an arithmetic number, because the mean of its divisors is an integer number (69633852769).

Almost surely, 2^208901101249 is an apocalyptic number.

208901101249 is the 457057-th square number.

208901101249 is the 228529-th centered octagonal number.

It is an amenable number.

208901101249 is a deficient number, since it is larger than the sum of its proper divisors (457058).

208901101249 is an frugal number, since it uses more digits than its factorization.

208901101249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914114 (or 457057 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 208901101249 in words is "two hundred eight billion, nine hundred one million, one hundred one thousand, two hundred forty-nine".