1947181125941 has 2 divisors, whose sum is σ = 1947181125942. Its totient is φ = 1947181125940.

The previous prime is 1947181125917. The next prime is 1947181125959. The reversal of 1947181125941 is 1495211817491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030537643716 + 916643482225 = 1015154^2 + 957415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1947181125941 is a prime.

It is a super-3 number, since 3×1947181125941³ (a number of 38 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1947181125541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973590562970 + 973590562971.

It is an arithmetic number, because the mean of its divisors is an integer number (973590562971).

Almost surely, 2^{1947181125941} is an apocalyptic number.

It is an amenable number.

1947181125941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947181125941 is an equidigital number, since it uses as much as digits as its factorization.

1947181125941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 53.

The spelling of 1947181125941 in words is "one trillion, nine hundred forty-seven billion, one hundred eighty-one million, one hundred twenty-five thousand, nine hundred forty-one".