208716964 has 6 divisors (see below), whose sum is σ = 365254694. Its totient is φ = 104358480.

The previous prime is 208716961. The next prime is 208716983. The reversal of 208716964 is 469617802.

It can be written as a sum of positive squares in only one way, i.e., 198528100 + 10188864 = 14090^2 + 3192^2 .

It is a super-2 number, since 2×208716964² = 87125542122754592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208716964.

It is not an unprimeable number, because it can be changed into a prime (208716961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26089617 + ... + 26089624.

Almost surely, 2^208716964 is an apocalyptic number.

It is an amenable number.

208716964 is a deficient number, since it is larger than the sum of its proper divisors (156537730).

208716964 is a wasteful number, since it uses less digits than its factorization.

208716964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52179245 (or 52179243 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 208716964 is about 14447.0399736417. The cubic root of 208716964 is about 593.1792031863.

The spelling of 208716964 in words is "two hundred eight million, seven hundred sixteen thousand, nine hundred sixty-four".