208134813 has 8 divisors (see below), whose sum is σ = 279969408. Its totient is φ = 137528384.

The previous prime is 208134799. The next prime is 208134833. The reversal of 208134813 is 318431802.

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

It is a cyclic number.

It is not a de Polignac number, because 208134813 - 2⁸ = 208134557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208134833) 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, 306645 + ... + 307322.

It is an arithmetic number, because the mean of its divisors is an integer number (34996176).

Almost surely, 2^208134813 is an apocalyptic number.

It is an amenable number.

208134813 is a deficient number, since it is larger than the sum of its proper divisors (71834595).

208134813 is a wasteful number, since it uses less digits than its factorization.

208134813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614083.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 208134813 is about 14426.8781446299. The cubic root of 208134813 is about 592.6271934021.

The spelling of 208134813 in words is "two hundred eight million, one hundred thirty-four thousand, eight hundred thirteen".