208847172004 has 27 divisors (see below), whose sum is σ = 370073433793. Its totient is φ = 103127996672.

The previous prime is 208847171989. The next prime is 208847172007. The reversal of 208847172004 is 400271748802.

The square root of 208847172004 is 456998.

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

It can be written as a sum of positive squares in only one way, i.e., 194242932900 + 14604239104 = 440730^2 + 120848^2 .

It is a super-2 number, since 2×208847172004² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208847172007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 75860292 + ... + 75863044.

Almost surely, 2^208847172004 is an apocalyptic number.

208847172004 is the 456998-th square number.

It is an amenable number.

208847172004 is a deficient number, since it is larger than the sum of its proper divisors (161226261789).

208847172004 is an frugal number, since it uses more digits than its factorization.

208847172004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676 (or 2838 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 43.

The spelling of 208847172004 in words is "two hundred eight billion, eight hundred forty-seven million, one hundred seventy-two thousand, four".