1078636109 has 2 divisors, whose sum is σ = 1078636110. Its totient is φ = 1078636108.

The previous prime is 1078636093. The next prime is 1078636147. The reversal of 1078636109 is 9016368701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075643209 + 2992900 = 32797^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078636109 - 2⁴ = 1078636093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078636409) 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, 539318054 + 539318055.

It is an arithmetic number, because the mean of its divisors is an integer number (539318055).

Almost surely, 2^1078636109 is an apocalyptic number.

It is an amenable number.

1078636109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078636109 is an equidigital number, since it uses as much as digits as its factorization.

1078636109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1078636109 is about 32842.5959540351. The cubic root of 1078636109 is about 1025.5534933299.

The spelling of 1078636109 in words is "one billion, seventy-eight million, six hundred thirty-six thousand, one hundred nine".