11681801 has 2 divisors, whose sum is σ = 11681802. Its totient is φ = 11681800.

The previous prime is 11681779. The next prime is 11681833. The reversal of 11681801 is 10818611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11560000 + 121801 = 3400^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 11681801 - 2¹⁸ = 11419657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11681881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5840900 + 5840901.

It is an arithmetic number, because the mean of its divisors is an integer number (5840901).

Almost surely, 2^11681801 is an apocalyptic number.

It is an amenable number.

11681801 is a deficient number, since it is larger than the sum of its proper divisors (1).

11681801 is an equidigital number, since it uses as much as digits as its factorization.

11681801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 11681801 is about 3417.8649768532. The cubic root of 11681801 is about 226.9010999629.

The spelling of 11681801 in words is "eleven million, six hundred eighty-one thousand, eight hundred one".