209111318963 has 2 divisors, whose sum is σ = 209111318964. Its totient is φ = 209111318962.

The previous prime is 209111318873. The next prime is 209111319023. The reversal of 209111318963 is 369813111902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209111318963 - 2¹⁴ = 209111302579 is a prime.

It is not a weakly prime, because it can be changed into another prime (209111318063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104555659481 + 104555659482.

It is an arithmetic number, because the mean of its divisors is an integer number (104555659482).

Almost surely, 2^209111318963 is an apocalyptic number.

209111318963 is a deficient number, since it is larger than the sum of its proper divisors (1).

209111318963 is an equidigital number, since it uses as much as digits as its factorization.

209111318963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 209111318963 in words is "two hundred nine billion, one hundred eleven million, three hundred eighteen thousand, nine hundred sixty-three".