981189211 has 2 divisors, whose sum is σ = 981189212. Its totient is φ = 981189210.

The previous prime is 981189197. The next prime is 981189217. The reversal of 981189211 is 112981189.

It is a strong prime.

It is an emirp because it is prime and its reverse (112981189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981189211 - 2²³ = 972800603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981189217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490594605 + 490594606.

It is an arithmetic number, because the mean of its divisors is an integer number (490594606).

Almost surely, 2^981189211 is an apocalyptic number.

981189211 is a deficient number, since it is larger than the sum of its proper divisors (1).

981189211 is an equidigital number, since it uses as much as digits as its factorization.

981189211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 40.

The square root of 981189211 is about 31323.9399022537. The cubic root of 981189211 is about 993.6900047057.

The spelling of 981189211 in words is "nine hundred eighty-one million, one hundred eighty-nine thousand, two hundred eleven".