11896861 has 2 divisors, whose sum is σ = 11896862. Its totient is φ = 11896860.

The previous prime is 11896849. The next prime is 11896867. The reversal of 11896861 is 16869811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6579225 + 5317636 = 2565^2 + 2306^2 .

It is a cyclic number.

It is not a de Polignac number, because 11896861 - 2⁷ = 11896733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11896867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948430 + 5948431.

It is an arithmetic number, because the mean of its divisors is an integer number (5948431).

Almost surely, 2^11896861 is an apocalyptic number.

It is an amenable number.

11896861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11896861 is an equidigital number, since it uses as much as digits as its factorization.

11896861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The square root of 11896861 is about 3449.1826568044. The cubic root of 11896861 is about 228.2850454065.

The spelling of 11896861 in words is "eleven million, eight hundred ninety-six thousand, eight hundred sixty-one".