208828987 has 2 divisors, whose sum is σ = 208828988. Its totient is φ = 208828986.

The previous prime is 208828951. The next prime is 208829041. The reversal of 208828987 is 789828802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208828987 - 2¹⁵ = 208796219 is a prime.

It is a super-2 number, since 2×208828987² = 87219091622892338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208828387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104414493 + 104414494.

It is an arithmetic number, because the mean of its divisors is an integer number (104414494).

Almost surely, 2^208828987 is an apocalyptic number.

208828987 is a deficient number, since it is larger than the sum of its proper divisors (1).

208828987 is an equidigital number, since it uses as much as digits as its factorization.

208828987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1032192, while the sum is 52.

The square root of 208828987 is about 14450.9164761270. The cubic root of 208828987 is about 593.2853083280.

The spelling of 208828987 in words is "two hundred eight million, eight hundred twenty-eight thousand, nine hundred eighty-seven".