208998208897 has 16 divisors (see below), whose sum is σ = 212363620560. Its totient is φ = 205659648000.

The previous prime is 208998208883. The next prime is 208998209023. The reversal of 208998208897 is 798802899802.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12650850576 + 196347358321 = 112476^2 + 443111^2 .

It is a cyclic number.

It is not a de Polignac number, because 208998208897 - 2²⁷ = 208863991169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208998208807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47400429 + ... + 47404837.

It is an arithmetic number, because the mean of its divisors is an integer number (13272726285).

Almost surely, 2^208998208897 is an apocalyptic number.

It is an amenable number.

208998208897 is a deficient number, since it is larger than the sum of its proper divisors (3365411663).

208998208897 is a wasteful number, since it uses less digits than its factorization.

208998208897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284.

The product of its (nonzero) digits is 83607552, while the sum is 70.

The spelling of 208998208897 in words is "two hundred eight billion, nine hundred ninety-eight million, two hundred eight thousand, eight hundred ninety-seven".