131189247 has 16 divisors (see below), whose sum is σ = 222119680. Its totient is φ = 74965176.

The previous prime is 131189237. The next prime is 131189287. The reversal of 131189247 is 742981131.

It is a happy number.

It is not a de Polignac number, because 131189247 - 2⁴ = 131189231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131189237) 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 15 ways as a sum of consecutive naturals, for example, 346873 + ... + 347250.

It is an arithmetic number, because the mean of its divisors is an integer number (13882480).

Almost surely, 2^131189247 is an apocalyptic number.

131189247 is a deficient number, since it is larger than the sum of its proper divisors (90930433).

131189247 is an equidigital number, since it uses as much as digits as its factorization.

131189247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694139 (or 694133 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 131189247 is about 11453.7874521924. The cubic root of 131189247 is about 508.1197547150.

The spelling of 131189247 in words is "one hundred thirty-one million, one hundred eighty-nine thousand, two hundred forty-seven".