131444437 has 4 divisors (see below), whose sum is σ = 131472396. Its totient is φ = 131416480.

The previous prime is 131444407. The next prime is 131444441. The reversal of 131444437 is 734444131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25745476 + 105698961 = 5074^2 + 10281^2 .

It is a cyclic number.

It is not a de Polignac number, because 131444437 - 2¹⁹ = 130920149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131444399 and 131444408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131444407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5008 + ... + 16969.

It is an arithmetic number, because the mean of its divisors is an integer number (32868099).

Almost surely, 2^131444437 is an apocalyptic number.

It is an amenable number.

131444437 is a deficient number, since it is larger than the sum of its proper divisors (27959).

131444437 is an equidigital number, since it uses as much as digits as its factorization.

131444437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27958.

The product of its digits is 16128, while the sum is 31.

The square root of 131444437 is about 11464.9220232848. The cubic root of 131444437 is about 508.4490070421.

Adding to 131444437 its reverse (734444131), we get a palindrome (865888568).

The spelling of 131444437 in words is "one hundred thirty-one million, four hundred forty-four thousand, four hundred thirty-seven".