11903115709 has 4 divisors (see below), whose sum is σ = 12603299004. Its totient is φ = 11202932416.

The previous prime is 11903115703. The next prime is 11903115727. The reversal of 11903115709 is 90751130911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90751130911 = 7 ⋅12964447273.

It can be written as a sum of positive squares in 2 ways, for example, as 7170363684 + 4732752025 = 84678^2 + 68795^2 .

It is a cyclic number.

It is not a de Polignac number, because 11903115709 - 2¹⁵ = 11903082941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11903115703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350091622 + ... + 350091655.

It is an arithmetic number, because the mean of its divisors is an integer number (3150824751).

Almost surely, 2^11903115709 is an apocalyptic number.

It is an amenable number.

11903115709 is a deficient number, since it is larger than the sum of its proper divisors (700183295).

11903115709 is an equidigital number, since it uses as much as digits as its factorization.

11903115709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700183294.

The product of its (nonzero) digits is 8505, while the sum is 37.

The spelling of 11903115709 in words is "eleven billion, nine hundred three million, one hundred fifteen thousand, seven hundred nine".