211133987 has 2 divisors, whose sum is σ = 211133988. Its totient is φ = 211133986.

The previous prime is 211133971. The next prime is 211134017. The reversal of 211133987 is 789331112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211133987 - 2⁴ = 211133971 is a prime.

It is not a weakly prime, because it can be changed into another prime (211133957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566993 + 105566994.

It is an arithmetic number, because the mean of its divisors is an integer number (105566994).

Almost surely, 2^211133987 is an apocalyptic number.

211133987 is a deficient number, since it is larger than the sum of its proper divisors (1).

211133987 is an equidigital number, since it uses as much as digits as its factorization.

211133987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 211133987 is about 14530.4503371368. The cubic root of 211133987 is about 595.4601689326.

The spelling of 211133987 in words is "two hundred eleven million, one hundred thirty-three thousand, nine hundred eighty-seven".