11881901 has 2 divisors, whose sum is σ = 11881902. Its totient is φ = 11881900.

The previous prime is 11881879. The next prime is 11881913. The reversal of 11881901 is 10918811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7155625 + 4726276 = 2675^2 + 2174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11881901 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 (11881931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5940950 + 5940951.

It is an arithmetic number, because the mean of its divisors is an integer number (5940951).

Almost surely, 2^11881901 is an apocalyptic number.

It is an amenable number.

11881901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11881901 is an equidigital number, since it uses as much as digits as its factorization.

11881901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The square root of 11881901 is about 3447.0133449118. The cubic root of 11881901 is about 228.1893177249.

The spelling of 11881901 in words is "eleven million, eight hundred eighty-one thousand, nine hundred one".