131188947 has 4 divisors (see below), whose sum is σ = 174918600. Its totient is φ = 87459296.

The previous prime is 131188927. The next prime is 131188961. The reversal of 131188947 is 749881131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749881131 = 3 ⋅249960377.

It is a cyclic number.

It is not a de Polignac number, because 131188947 - 2¹⁰ = 131187923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131188899 and 131188908.

It is not an unprimeable number, because it can be changed into a prime (131188927) 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, 21864822 + ... + 21864827.

It is an arithmetic number, because the mean of its divisors is an integer number (43729650).

Almost surely, 2^131188947 is an apocalyptic number.

131188947 is a deficient number, since it is larger than the sum of its proper divisors (43729653).

131188947 is an equidigital number, since it uses as much as digits as its factorization.

131188947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43729652.

The product of its digits is 48384, while the sum is 42.

The square root of 131188947 is about 11453.7743560802. The cubic root of 131188947 is about 508.1193673966.

The spelling of 131188947 in words is "one hundred thirty-one million, one hundred eighty-eight thousand, nine hundred forty-seven".