131926989 has 4 divisors (see below), whose sum is σ = 175902656. Its totient is φ = 87951324.

The previous prime is 131926981. The next prime is 131926997. The reversal of 131926989 is 989629131.

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 an interprime number because it is at equal distance from previous prime (131926981) and next prime (131926997).

It is not a de Polignac number, because 131926989 - 2³ = 131926981 is a prime.

It is a super-2 number, since 2×131926989² = 34809460853212242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131926981) 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 3 ways as a sum of consecutive naturals, for example, 21987829 + ... + 21987834.

It is an arithmetic number, because the mean of its divisors is an integer number (43975664).

Almost surely, 2^131926989 is an apocalyptic number.

It is an amenable number.

131926989 is a deficient number, since it is larger than the sum of its proper divisors (43975667).

131926989 is an equidigital number, since it uses as much as digits as its factorization.

131926989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43975666.

The product of its digits is 209952, while the sum is 48.

The square root of 131926989 is about 11485.9474576545. The cubic root of 131926989 is about 509.0704444068.

The spelling of 131926989 in words is "one hundred thirty-one million, nine hundred twenty-six thousand, nine hundred eighty-nine".