11971901 has 2 divisors, whose sum is σ = 11971902. Its totient is φ = 11971900.

The previous prime is 11971879. The next prime is 11971913. The reversal of 11971901 is 10917911.

11971901 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11909401 + 62500 = 3451^2 + 250^2 .

It is an emirp because it is prime and its reverse (10917911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11971901 - 2¹⁰ = 11970877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11971991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5985950 + 5985951.

It is an arithmetic number, because the mean of its divisors is an integer number (5985951).

Almost surely, 2^11971901 is an apocalyptic number.

It is an amenable number.

11971901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11971901 is an equidigital number, since it uses as much as digits as its factorization.

11971901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 11971901 is about 3460.0434968364. The cubic root of 11971901 is about 228.7640125988.

The spelling of 11971901 in words is "eleven million, nine hundred seventy-one thousand, nine hundred one".