11731309831 has 2 divisors, whose sum is σ = 11731309832. Its totient is φ = 11731309830.

The previous prime is 11731309829. The next prime is 11731309841. The reversal of 11731309831 is 13890313711.

It is a weak prime.

It is an emirp because it is prime and its reverse (13890313711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11731309831 - 2¹ = 11731309829 is a prime.

It is a super-3 number, since 3×11731309831³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 11731309829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11731309801) 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, 5865654915 + 5865654916.

It is an arithmetic number, because the mean of its divisors is an integer number (5865654916).

Almost surely, 2^11731309831 is an apocalyptic number.

11731309831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11731309831 is an equidigital number, since it uses as much as digits as its factorization.

11731309831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 11731309831 in words is "eleven billion, seven hundred thirty-one million, three hundred nine thousand, eight hundred thirty-one".