11957884013 has 2 divisors, whose sum is σ = 11957884014. Its totient is φ = 11957884012.

The previous prime is 11957883979. The next prime is 11957884019. The reversal of 11957884013 is 31048875911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11340759049 + 617124964 = 106493^2 + 24842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11957884013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11957884019) 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 as a sum of consecutive naturals, namely, 5978942006 + 5978942007.

It is an arithmetic number, because the mean of its divisors is an integer number (5978942007).

Almost surely, 2^11957884013 is an apocalyptic number.

It is an amenable number.

11957884013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11957884013 is an equidigital number, since it uses as much as digits as its factorization.

11957884013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 11957884013 in words is "eleven billion, nine hundred fifty-seven million, eight hundred eighty-four thousand, thirteen".