11391203959 has 2 divisors, whose sum is σ = 11391203960. Its totient is φ = 11391203958.

The previous prime is 11391203947. The next prime is 11391203977. The reversal of 11391203959 is 95930219311.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (95930219311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11391203959 - 2¹¹ = 11391201911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11391201959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695601979 + 5695601980.

It is an arithmetic number, because the mean of its divisors is an integer number (5695601980).

Almost surely, 2^11391203959 is an apocalyptic number.

11391203959 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391203959 is an equidigital number, since it uses as much as digits as its factorization.

11391203959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 43.

The spelling of 11391203959 in words is "eleven billion, three hundred ninety-one million, two hundred three thousand, nine hundred fifty-nine".