1240109035909 has 2 divisors, whose sum is σ = 1240109035910. Its totient is φ = 1240109035908.

The previous prime is 1240109035883. The next prime is 1240109035961. The reversal of 1240109035909 is 9095309010421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765047608900 + 475061427009 = 874670^2 + 689247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240109035909 - 2⁹ = 1240109035397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240109035409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620054517954 + 620054517955.

It is an arithmetic number, because the mean of its divisors is an integer number (620054517955).

Almost surely, 2^{1240109035909} is an apocalyptic number.

It is an amenable number.

1240109035909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240109035909 is an equidigital number, since it uses as much as digits as its factorization.

1240109035909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 1240109035909 in words is "one trillion, two hundred forty billion, one hundred nine million, thirty-five thousand, nine hundred nine".