208122797 has 4 divisors (see below), whose sum is σ = 211054176. Its totient is φ = 205191420.

The previous prime is 208122793. The next prime is 208122829. The reversal of 208122797 is 797221802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 208122797 - 2² = 208122793 is a prime.

It is a super-2 number, since 2×208122797² = 86630197262206418, which contains 22 as substring.

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 208122797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208122793) 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 3 ways as a sum of consecutive naturals, for example, 1465583 + ... + 1465724.

It is an arithmetic number, because the mean of its divisors is an integer number (52763544).

Almost surely, 2^208122797 is an apocalyptic number.

It is an amenable number.

208122797 is a deficient number, since it is larger than the sum of its proper divisors (2931379).

208122797 is an equidigital number, since it uses as much as digits as its factorization.

208122797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931378.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 208122797 is about 14426.4616937072. The cubic root of 208122797 is about 592.6157887019.

The spelling of 208122797 in words is "two hundred eight million, one hundred twenty-two thousand, seven hundred ninety-seven".