208090807 has 8 divisors (see below), whose sum is σ = 212491296. Its totient is φ = 203732352.

The previous prime is 208090787. The next prime is 208090859. The reversal of 208090807 is 708090802.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208090807 is a prime.

It is a super-2 number, since 2×208090807² = 86603567915822498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208093807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 20404.

It is an arithmetic number, because the mean of its divisors is an integer number (26561412).

Almost surely, 2^208090807 is an apocalyptic number.

208090807 is a deficient number, since it is larger than the sum of its proper divisors (4400489).

208090807 is a wasteful number, since it uses less digits than its factorization.

208090807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21017.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 208090807 is about 14425.3529246254. The cubic root of 208090807 is about 592.5854240154.

The spelling of 208090807 in words is "two hundred eight million, ninety thousand, eight hundred seven".