131988749 has 8 divisors (see below), whose sum is σ = 132795072. Its totient is φ = 131185600.

The previous prime is 131988739. The next prime is 131988757. The reversal of 131988749 is 947889131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131988749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131988697 and 131988706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131988739) 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 7 ways as a sum of consecutive naturals, for example, 177272 + ... + 178014.

It is an arithmetic number, because the mean of its divisors is an integer number (16599384).

Almost surely, 2^131988749 is an apocalyptic number.

It is an amenable number.

131988749 is a deficient number, since it is larger than the sum of its proper divisors (806323).

131988749 is an equidigital number, since it uses as much as digits as its factorization.

131988749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587.

The product of its digits is 435456, while the sum is 50.

The square root of 131988749 is about 11488.6356457153. The cubic root of 131988749 is about 509.1498703732.

The spelling of 131988749 in words is "one hundred thirty-one million, nine hundred eighty-eight thousand, seven hundred forty-nine".