212987 has 2 divisors, whose sum is σ = 212988. Its totient is φ = 212986.

The previous prime is 212981. The next prime is 212999. The reversal of 212987 is 789212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212987 - 2⁶ = 212923 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (212981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106493 + 106494.

It is an arithmetic number, because the mean of its divisors is an integer number (106494).

2²¹²⁹⁸⁷ is an apocalyptic number.

212987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212987 is an equidigital number, since it uses as much as digits as its factorization.

212987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 212987 is about 461.5051462335. The cubic root of 212987 is about 59.7197111938.

The spelling of 212987 in words is "two hundred twelve thousand, nine hundred eighty-seven".