131186984 has 24 divisors (see below), whose sum is σ = 249565530. Its totient is φ = 64649760.

The previous prime is 131186983. The next prime is 131186987. The reversal of 131186984 is 489681131.

131186984 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 70190884 + 60996100 = 8378^2 + 7810^2 .

It is not an unprimeable number, because it can be changed into a prime (131186983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38702 + ... + 41954.

Almost surely, 2^131186984 is an apocalyptic number.

It is an amenable number.

131186984 is a deficient number, since it is larger than the sum of its proper divisors (118378546).

131186984 is an equidigital number, since it uses as much as digits as its factorization.

131186984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401 (or 3326 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 131186984 is about 11453.6886634830. The cubic root of 131186984 is about 508.1168330283.

It can be divided in two parts, 13118 and 6984, that added together give a palindrome (20102).

The spelling of 131186984 in words is "one hundred thirty-one million, one hundred eighty-six thousand, nine hundred eighty-four".