11948387131 has 4 divisors (see below), whose sum is σ = 11948844600. Its totient is φ = 11947929664.

The previous prime is 11948387123. The next prime is 11948387137. The reversal of 11948387131 is 13178384911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11948387131 - 2³ = 11948387123 is a prime.

It is a super-2 number, since 2×11948387131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11948387137) 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, 187021 + ... + 242638.

It is an arithmetic number, because the mean of its divisors is an integer number (2987211150).

Almost surely, 2^11948387131 is an apocalyptic number.

11948387131 is a deficient number, since it is larger than the sum of its proper divisors (457469).

11948387131 is an equidigital number, since it uses as much as digits as its factorization.

11948387131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457468.

The product of its digits is 145152, while the sum is 46.

The spelling of 11948387131 in words is "eleven billion, nine hundred forty-eight million, three hundred eighty-seven thousand, one hundred thirty-one".