208577093 has 4 divisors (see below), whose sum is σ = 209488140. Its totient is φ = 207666048.

The previous prime is 208577081. The next prime is 208577111. The reversal of 208577093 is 390775802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 390775802 = 2 ⋅195387901.

It can be written as a sum of positive squares in 2 ways, for example, as 89832484 + 118744609 = 9478^2 + 10897^2 .

It is a cyclic number.

It is not a de Polignac number, because 208577093 - 2¹⁶ = 208511557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208577093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208507093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455180 + ... + 455637.

It is an arithmetic number, because the mean of its divisors is an integer number (52372035).

Almost surely, 2^208577093 is an apocalyptic number.

It is an amenable number.

208577093 is a deficient number, since it is larger than the sum of its proper divisors (911047).

208577093 is an equidigital number, since it uses as much as digits as its factorization.

208577093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911046.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 208577093 is about 14442.1983437425. The cubic root of 208577093 is about 593.0466678662.

The spelling of 208577093 in words is "two hundred eight million, five hundred seventy-seven thousand, ninety-three".