213230987 has 2 divisors, whose sum is σ = 213230988. Its totient is φ = 213230986.

The previous prime is 213230959. The next prime is 213231013. The reversal of 213230987 is 789032312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213230987 - 2¹² = 213226891 is a prime.

It is not a weakly prime, because it can be changed into another prime (213230957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615493 + 106615494.

It is an arithmetic number, because the mean of its divisors is an integer number (106615494).

Almost surely, 2^213230987 is an apocalyptic number.

213230987 is a deficient number, since it is larger than the sum of its proper divisors (1).

213230987 is an equidigital number, since it uses as much as digits as its factorization.

213230987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 213230987 is about 14602.4308592782. The cubic root of 213230987 is about 597.4250643931.

The spelling of 213230987 in words is "two hundred thirteen million, two hundred thirty thousand, nine hundred eighty-seven".