211680629 has 2 divisors, whose sum is σ = 211680630. Its totient is φ = 211680628.

The previous prime is 211680619. The next prime is 211680631. The reversal of 211680629 is 926086112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169780900 + 41899729 = 13030^2 + 6473^2 .

It is a cyclic number.

It is not a de Polignac number, because 211680629 - 2⁸ = 211680373 is a prime.

Together with 211680631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211680619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105840314 + 105840315.

It is an arithmetic number, because the mean of its divisors is an integer number (105840315).

Almost surely, 2^211680629 is an apocalyptic number.

It is an amenable number.

211680629 is a deficient number, since it is larger than the sum of its proper divisors (1).

211680629 is an equidigital number, since it uses as much as digits as its factorization.

211680629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 211680629 is about 14549.2483998315. The cubic root of 211680629 is about 595.9736233316.

The spelling of 211680629 in words is "two hundred eleven million, six hundred eighty thousand, six hundred twenty-nine".