131549449 has 4 divisors (see below), whose sum is σ = 131862340. Its totient is φ = 131236560.

The previous prime is 131549419. The next prime is 131549459. The reversal of 131549449 is 944945131.

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 33143049 + 98406400 = 5757^2 + 9920^2 .

It is a cyclic number.

It is not a de Polignac number, because 131549449 - 2²³ = 123160841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131549419) 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, 155814 + ... + 156655.

It is an arithmetic number, because the mean of its divisors is an integer number (32965585).

Almost surely, 2^131549449 is an apocalyptic number.

It is an amenable number.

131549449 is a deficient number, since it is larger than the sum of its proper divisors (312891).

131549449 is an equidigital number, since it uses as much as digits as its factorization.

131549449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312890.

The product of its digits is 77760, while the sum is 40.

The square root of 131549449 is about 11469.5008173852. The cubic root of 131549449 is about 508.5843723110.

The spelling of 131549449 in words is "one hundred thirty-one million, five hundred forty-nine thousand, four hundred forty-nine".