211967947 has 2 divisors, whose sum is σ = 211967948. Its totient is φ = 211967946.

The previous prime is 211967939. The next prime is 211968011. The reversal of 211967947 is 749769112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211967947 - 2³ = 211967939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211967897 and 211967906.

It is not a weakly prime, because it can be changed into another prime (211967047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105983973 + 105983974.

It is an arithmetic number, because the mean of its divisors is an integer number (105983974).

Almost surely, 2^211967947 is an apocalyptic number.

211967947 is a deficient number, since it is larger than the sum of its proper divisors (1).

211967947 is an equidigital number, since it uses as much as digits as its factorization.

211967947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 211967947 is about 14559.1190324140. The cubic root of 211967947 is about 596.2431434032.

The spelling of 211967947 in words is "two hundred eleven million, nine hundred sixty-seven thousand, nine hundred forty-seven".