131779444 has 12 divisors (see below), whose sum is σ = 244179684. Its totient is φ = 62013824.

The previous prime is 131779423. The next prime is 131779471. The reversal of 131779444 is 444977131.

It can be written as a sum of positive squares in 2 ways, for example, as 42250000 + 89529444 = 6500^2 + 9462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131779397 and 131779406.

It is a congruent number.

It is an unprimeable number.

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, 968899 + ... + 969034.

It is an arithmetic number, because the mean of its divisors is an integer number (20348307).

Almost surely, 2^131779444 is an apocalyptic number.

It is an amenable number.

131779444 is a deficient number, since it is larger than the sum of its proper divisors (112400240).

131779444 is a wasteful number, since it uses less digits than its factorization.

131779444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937954 (or 1937952 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 131779444 is about 11479.5228123821. The cubic root of 131779444 is about 508.8805949110.

The spelling of 131779444 in words is "one hundred thirty-one million, seven hundred seventy-nine thousand, four hundred forty-four".