211945963 has 2 divisors, whose sum is σ = 211945964. Its totient is φ = 211945962.

The previous prime is 211945927. The next prime is 211945973. The reversal of 211945963 is 369549112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211945963 - 2¹⁷ = 211814891 is a prime.

It is not a weakly prime, because it can be changed into another prime (211945973) 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, 105972981 + 105972982.

It is an arithmetic number, because the mean of its divisors is an integer number (105972982).

Almost surely, 2^211945963 is an apocalyptic number.

211945963 is a deficient number, since it is larger than the sum of its proper divisors (1).

211945963 is an equidigital number, since it uses as much as digits as its factorization.

211945963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 211945963 is about 14558.3640221008. The cubic root of 211945963 is about 596.2225298110. Note that the first 3 decimals are identical.

The spelling of 211945963 in words is "two hundred eleven million, nine hundred forty-five thousand, nine hundred sixty-three".