213674643187 has 2 divisors, whose sum is σ = 213674643188. Its totient is φ = 213674643186.

The previous prime is 213674643151. The next prime is 213674643239. The reversal of 213674643187 is 781346476312.

It is an a-pointer prime, because the next prime (213674643239) can be obtained adding 213674643187 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213674643187 - 2¹¹ = 213674641139 is a prime.

It is not a weakly prime, because it can be changed into another prime (213674643107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106837321593 + 106837321594.

It is an arithmetic number, because the mean of its divisors is an integer number (106837321594).

Almost surely, 2^213674643187 is an apocalyptic number.

213674643187 is a deficient number, since it is larger than the sum of its proper divisors (1).

213674643187 is an equidigital number, since it uses as much as digits as its factorization.

213674643187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 52.

The spelling of 213674643187 in words is "two hundred thirteen billion, six hundred seventy-four million, six hundred forty-three thousand, one hundred eighty-seven".