1078243709 has 2 divisors, whose sum is σ = 1078243710. Its totient is φ = 1078243708.

The previous prime is 1078243669. The next prime is 1078243739. The reversal of 1078243709 is 9073428701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062955609 + 15288100 = 32603^2 + 3910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1078243709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078243739) 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, 539121854 + 539121855.

It is an arithmetic number, because the mean of its divisors is an integer number (539121855).

Almost surely, 2^1078243709 is an apocalyptic number.

It is an amenable number.

1078243709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078243709 is an equidigital number, since it uses as much as digits as its factorization.

1078243709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 1078243709 is about 32836.6214614110. The cubic root of 1078243709 is about 1025.4291152697.

The spelling of 1078243709 in words is "one billion, seventy-eight million, two hundred forty-three thousand, seven hundred nine".