131989129 has 4 divisors (see below), whose sum is σ = 133959184. Its totient is φ = 130019076.

The previous prime is 131989097. The next prime is 131989163. The reversal of 131989129 is 921989131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131989129 - 2⁵ = 131989097 is a prime.

It is a super-2 number, since 2×131989129² = 34842260348357282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131989199) 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 3 ways as a sum of consecutive naturals, for example, 984927 + ... + 985060.

It is an arithmetic number, because the mean of its divisors is an integer number (33489796).

Almost surely, 2^131989129 is an apocalyptic number.

It is an amenable number.

131989129 is a deficient number, since it is larger than the sum of its proper divisors (1970055).

131989129 is an equidigital number, since it uses as much as digits as its factorization.

131989129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970054.

The product of its digits is 34992, while the sum is 43.

The square root of 131989129 is about 11488.6521837855. The cubic root of 131989129 is about 509.1503589926.

The spelling of 131989129 in words is "one hundred thirty-one million, nine hundred eighty-nine thousand, one hundred twenty-nine".