1149778079 has 2 divisors, whose sum is σ = 1149778080. Its totient is φ = 1149778078.

The previous prime is 1149778037. The next prime is 1149778177. The reversal of 1149778079 is 9708779411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1149778079 - 2²⁴ = 1133000863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149778079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1149772079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574889039 + 574889040.

It is an arithmetic number, because the mean of its divisors is an integer number (574889040).

Almost surely, 2^1149778079 is an apocalyptic number.

1149778079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149778079 is an equidigital number, since it uses as much as digits as its factorization.

1149778079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 53.

The square root of 1149778079 is about 33908.3777111203. The cubic root of 1149778079 is about 1047.6221562816.

The spelling of 1149778079 in words is "one billion, one hundred forty-nine million, seven hundred seventy-eight thousand, seventy-nine".