211990873 has 2 divisors, whose sum is σ = 211990874. Its totient is φ = 211990872.

The previous prime is 211990853. The next prime is 211990907. The reversal of 211990873 is 378099112.

211990873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153437769 + 58553104 = 12387^2 + 7652^2 .

It is a cyclic number.

It is not a de Polignac number, because 211990873 - 2²¹ = 209893721 is a prime.

It is not a weakly prime, because it can be changed into another prime (211990853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105995436 + 105995437.

It is an arithmetic number, because the mean of its divisors is an integer number (105995437).

Almost surely, 2^211990873 is an apocalyptic number.

It is an amenable number.

211990873 is a deficient number, since it is larger than the sum of its proper divisors (1).

211990873 is an equidigital number, since it uses as much as digits as its factorization.

211990873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 211990873 is about 14559.9063527208. The cubic root of 211990873 is about 596.2646387562.

The spelling of 211990873 in words is "two hundred eleven million, nine hundred ninety thousand, eight hundred seventy-three".