208201897 has 4 divisors (see below), whose sum is σ = 211309456. Its totient is φ = 205094340.

The previous prime is 208201853. The next prime is 208201901. The reversal of 208201897 is 798102802.

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 a cyclic number.

It is not a de Polignac number, because 208201897 - 2⁷ = 208201769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208211897) 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, 1553679 + ... + 1553812.

It is an arithmetic number, because the mean of its divisors is an integer number (52827364).

Almost surely, 2^208201897 is an apocalyptic number.

It is an amenable number.

208201897 is a deficient number, since it is larger than the sum of its proper divisors (3107559).

208201897 is an equidigital number, since it uses as much as digits as its factorization.

208201897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107558.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 208201897 is about 14429.2029232387. The cubic root of 208201897 is about 592.6908565180.

The spelling of 208201897 in words is "two hundred eight million, two hundred one thousand, eight hundred ninety-seven".