1941181213 has 2 divisors, whose sum is σ = 1941181214. Its totient is φ = 1941181212.

The previous prime is 1941181201. The next prime is 1941181217. The reversal of 1941181213 is 3121811491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1403776089 + 537405124 = 37467^2 + 23182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941181213 - 2⁹ = 1941180701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1941181217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970590606 + 970590607.

It is an arithmetic number, because the mean of its divisors is an integer number (970590607).

Almost surely, 2^1941181213 is an apocalyptic number.

It is an amenable number.

1941181213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941181213 is an equidigital number, since it uses as much as digits as its factorization.

1941181213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 1941181213 is about 44058.8380804578. The cubic root of 1941181213 is about 1247.4467805136.

The spelling of 1941181213 in words is "one billion, nine hundred forty-one million, one hundred eighty-one thousand, two hundred thirteen".