208868653 has 32 divisors (see below), whose sum is σ = 258252800. Its totient is φ = 164975616.

The previous prime is 208868641. The next prime is 208868657. The reversal of 208868653 is 356868802.

It is a happy number.

208868653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208868653 is a prime.

It is a super-2 number, since 2×208868653² = 87252228412068818, 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 (208868657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1082125 + ... + 1082317.

It is an arithmetic number, because the mean of its divisors is an integer number (8070400).

Almost surely, 2^208868653 is an apocalyptic number.

It is an amenable number.

208868653 is a deficient number, since it is larger than the sum of its proper divisors (49384147).

208868653 is a wasteful number, since it uses less digits than its factorization.

208868653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 208868653 is about 14452.2888498673. The cubic root of 208868653 is about 593.3228697884.

The spelling of 208868653 in words is "two hundred eight million, eight hundred sixty-eight thousand, six hundred fifty-three".