208671413 has 8 divisors (see below), whose sum is σ = 222561432. Its totient is φ = 194960896.

The previous prime is 208671409. The next prime is 208671439. The reversal of 208671413 is 314176802.

It can be written as a sum of positive squares in 4 ways, for example, as 134142724 + 74528689 = 11582^2 + 8633^2 .

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

It is not a de Polignac number, because 208671413 - 2² = 208671409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208671413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208671313) 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, 42470 + ... + 47127.

It is an arithmetic number, because the mean of its divisors is an integer number (27820179).

Almost surely, 2^208671413 is an apocalyptic number.

It is an amenable number.

208671413 is a deficient number, since it is larger than the sum of its proper divisors (13890019).

208671413 is a wasteful number, since it uses less digits than its factorization.

208671413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89751.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 208671413 is about 14445.4634055125. The cubic root of 208671413 is about 593.1360476593.

The spelling of 208671413 in words is "two hundred eight million, six hundred seventy-one thousand, four hundred thirteen".