208813493 has 8 divisors (see below), whose sum is σ = 238792512. Its totient is φ = 178871616.

The previous prime is 208813487. The next prime is 208813519. The reversal of 208813493 is 394318802.

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

It is not a de Polignac number, because 208813493 - 2¹⁴ = 208797109 is a prime.

It is a super-2 number, since 2×208813493² = 87206149717722098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208813453) 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, 4046 + ... + 20832.

It is an arithmetic number, because the mean of its divisors is an integer number (29849064).

Almost surely, 2^208813493 is an apocalyptic number.

It is an amenable number.

208813493 is a deficient number, since it is larger than the sum of its proper divisors (29979019).

208813493 is a wasteful number, since it uses less digits than its factorization.

208813493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18571.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 208813493 is about 14450.3803756164. The cubic root of 208813493 is about 593.2706350938.

The spelling of 208813493 in words is "two hundred eight million, eight hundred thirteen thousand, four hundred ninety-three".