212236987 has 2 divisors, whose sum is σ = 212236988. Its totient is φ = 212236986.

The previous prime is 212236979. The next prime is 212237009. The reversal of 212236987 is 789632212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212236987 - 2³ = 212236979 is a prime.

It is not a weakly prime, because it can be changed into another prime (212236957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106118493 + 106118494.

It is an arithmetic number, because the mean of its divisors is an integer number (106118494).

Almost surely, 2^212236987 is an apocalyptic number.

212236987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212236987 is an equidigital number, since it uses as much as digits as its factorization.

212236987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 212236987 is about 14568.3556724841. The cubic root of 212236987 is about 596.4952969911.

The spelling of 212236987 in words is "two hundred twelve million, two hundred thirty-six thousand, nine hundred eighty-seven".