11981773 has 2 divisors, whose sum is σ = 11981774. Its totient is φ = 11981772.

The previous prime is 11981743. The next prime is 11981777. The reversal of 11981773 is 37718911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11923209 + 58564 = 3453^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 11981773 - 2¹³ = 11973581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11981777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990886 + 5990887.

It is an arithmetic number, because the mean of its divisors is an integer number (5990887).

Almost surely, 2^11981773 is an apocalyptic number.

It is an amenable number.

11981773 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981773 is an equidigital number, since it uses as much as digits as its factorization.

11981773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 37.

The square root of 11981773 is about 3461.4697745322. The cubic root of 11981773 is about 228.8268747366.

The spelling of 11981773 in words is "eleven million, nine hundred eighty-one thousand, seven hundred seventy-three".