11801771 has 2 divisors, whose sum is σ = 11801772. Its totient is φ = 11801770.

The previous prime is 11801767. The next prime is 11801821. The reversal of 11801771 is 17710811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11801771 - 2² = 11801767 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11801771.

It is not a weakly prime, because it can be changed into another prime (11801701) 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, 5900885 + 5900886.

It is an arithmetic number, because the mean of its divisors is an integer number (5900886).

Almost surely, 2^11801771 is an apocalyptic number.

11801771 is a deficient number, since it is larger than the sum of its proper divisors (1).

11801771 is an equidigital number, since it uses as much as digits as its factorization.

11801771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 26.

The square root of 11801771 is about 3435.3705768083. The cubic root of 11801771 is about 227.6752005483.

The spelling of 11801771 in words is "eleven million, eight hundred one thousand, seven hundred seventy-one".