208660797 has 12 divisors (see below), whose sum is σ = 309545340. Its totient is φ = 135347328.

The previous prime is 208660789. The next prime is 208660813. The reversal of 208660797 is 797066802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 178783641 + 29877156 = 13371^2 + 5466^2 .

It is not a de Polignac number, because 208660797 - 2³ = 208660789 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208660747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312972 + ... + 313637.

It is an arithmetic number, because the mean of its divisors is an integer number (25795445).

Almost surely, 2^208660797 is an apocalyptic number.

It is an amenable number.

208660797 is a deficient number, since it is larger than the sum of its proper divisors (100884543).

208660797 is a wasteful number, since it uses less digits than its factorization.

208660797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626652 (or 626649 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 208660797 is about 14445.0959498371. The cubic root of 208660797 is about 593.1259890397.

The spelling of 208660797 in words is "two hundred eight million, six hundred sixty thousand, seven hundred ninety-seven".