11863681 has 2 divisors, whose sum is σ = 11863682. Its totient is φ = 11863680.

The previous prime is 11863651. The next prime is 11863703. The reversal of 11863681 is 18636811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 167281 = 3420^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 11863681 - 2¹³ = 11855489 is a prime.

It is a super-2 number, since 2×11863681² = 281493853739522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11863601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5931840 + 5931841.

It is an arithmetic number, because the mean of its divisors is an integer number (5931841).

Almost surely, 2^11863681 is an apocalyptic number.

It is an amenable number.

11863681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11863681 is an equidigital number, since it uses as much as digits as its factorization.

11863681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 11863681 is about 3444.3694633416. The cubic root of 11863681 is about 228.0726210137.

It can be divided in two parts, 11863 and 681, that added together give a square (12544 = 112²).

The spelling of 11863681 in words is "eleven million, eight hundred sixty-three thousand, six hundred eighty-one".