131899989 has 16 divisors (see below), whose sum is σ = 189628992. Its totient is φ = 81068928.

The previous prime is 131899981. The next prime is 131900003. The reversal of 131899989 is 989998131.

It is not a de Polignac number, because 131899989 - 2³ = 131899981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131899981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41242 + ... + 44324.

It is an arithmetic number, because the mean of its divisors is an integer number (11851812).

Almost surely, 2^131899989 is an apocalyptic number.

It is an amenable number.

131899989 is a deficient number, since it is larger than the sum of its proper divisors (57729003).

131899989 is a wasteful number, since it uses less digits than its factorization.

131899989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196.

The product of its digits is 1259712, while the sum is 57.

The square root of 131899989 is about 11484.7720482385. The cubic root of 131899989 is about 509.0357134800.

The spelling of 131899989 in words is "one hundred thirty-one million, eight hundred ninety-nine thousand, nine hundred eighty-nine".