11780149 has 2 divisors, whose sum is σ = 11780150. Its totient is φ = 11780148.

The previous prime is 11780147. The next prime is 11780179. The reversal of 11780149 is 94108711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 342225 = 3382^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 11780149 - 2¹ = 11780147 is a prime.

Together with 11780147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11780149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11780147) 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, 5890074 + 5890075.

It is an arithmetic number, because the mean of its divisors is an integer number (5890075).

Almost surely, 2^11780149 is an apocalyptic number.

It is an amenable number.

11780149 is a deficient number, since it is larger than the sum of its proper divisors (1).

11780149 is an equidigital number, since it uses as much as digits as its factorization.

11780149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 11780149 is about 3432.2221664688. Note that the first 3 decimals coincide. The cubic root of 11780149 is about 227.5360744630.

The spelling of 11780149 in words is "eleven million, seven hundred eighty thousand, one hundred forty-nine".