11308391009 has 4 divisors (see below), whose sum is σ = 11389746480. Its totient is φ = 11227035540.

The previous prime is 11308390969. The next prime is 11308391021. The reversal of 11308391009 is 90019380311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90019380311 = 7 ⋅12859911473.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11308391009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11308391009.

It is not an unprimeable number, because it can be changed into a prime (11308391069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40677527 + ... + 40677804.

It is an arithmetic number, because the mean of its divisors is an integer number (2847436620).

Almost surely, 2^11308391009 is an apocalyptic number.

It is an amenable number.

11308391009 is a deficient number, since it is larger than the sum of its proper divisors (81355471).

11308391009 is an equidigital number, since it uses as much as digits as its factorization.

11308391009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81355470.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 11308391009 in words is "eleven billion, three hundred eight million, three hundred ninety-one thousand, nine".