987211 has 2 divisors, whose sum is σ = 987212. Its totient is φ = 987210.

The previous prime is 987209. The next prime is 987227. The reversal of 987211 is 112789.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 987211 - 2¹ = 987209 is a prime.

Together with 987209, it forms a pair of twin primes.

It is equal to p₇₇₅₉₀ and since 987211 and 77590 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 987211.

It is not a weakly prime, because it can be changed into another prime (987251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493605 + 493606.

It is an arithmetic number, because the mean of its divisors is an integer number (493606).

2⁹⁸⁷²¹¹ is an apocalyptic number.

987211 is a deficient number, since it is larger than the sum of its proper divisors (1).

987211 is an equidigital number, since it uses as much as digits as its factorization.

987211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 987211 is about 993.5849233961. The cubic root of 987211 is about 99.5718696599.

The spelling of 987211 in words is "nine hundred eighty-seven thousand, two hundred eleven".