131489736 has 64 divisors (see below), whose sum is σ = 383376000. Its totient is φ = 37566144.

The previous prime is 131489663. The next prime is 131489737. The reversal of 131489736 is 637984131.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (131489737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (5990250).

Almost surely, 2^131489736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131489736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191688000).

131489736 is an abundant number, since it is smaller than the sum of its proper divisors (251886264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131489736 is a wasteful number, since it uses less digits than its factorization.

131489736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16003 (or 15985 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 131489736 is about 11466.8974007793. The cubic root of 131489736 is about 508.5074083630.

The spelling of 131489736 in words is "one hundred thirty-one million, four hundred eighty-nine thousand, seven hundred thirty-six".