11178649 has 2 divisors, whose sum is σ = 11178650. Its totient is φ = 11178648.

The previous prime is 11178637. The next prime is 11178679. The reversal of 11178649 is 94687111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 5322249 = 2420^2 + 2307^2 .

It is an emirp because it is prime and its reverse (94687111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11178649 - 2¹¹ = 11176601 is a prime.

It is not a weakly prime, because it can be changed into another prime (11178679) 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, 5589324 + 5589325.

It is an arithmetic number, because the mean of its divisors is an integer number (5589325).

Almost surely, 2^11178649 is an apocalyptic number.

It is an amenable number.

11178649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11178649 is an equidigital number, since it uses as much as digits as its factorization.

11178649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 11178649 is about 3343.4486686653. The cubic root of 11178649 is about 223.5955245983.

The spelling of 11178649 in words is "eleven million, one hundred seventy-eight thousand, six hundred forty-nine".