131839549 has 2 divisors, whose sum is σ = 131839550. Its totient is φ = 131839548.

The previous prime is 131839541. The next prime is 131839553. The reversal of 131839549 is 945938131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130644900 + 1194649 = 11430^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 131839549 - 2³ = 131839541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131839541) 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 as a sum of consecutive naturals, namely, 65919774 + 65919775.

It is an arithmetic number, because the mean of its divisors is an integer number (65919775).

Almost surely, 2^131839549 is an apocalyptic number.

It is an amenable number.

131839549 is a deficient number, since it is larger than the sum of its proper divisors (1).

131839549 is an equidigital number, since it uses as much as digits as its factorization.

131839549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 131839549 is about 11482.1404363472. The cubic root of 131839549 is about 508.9579504738.

The spelling of 131839549 in words is "one hundred thirty-one million, eight hundred thirty-nine thousand, five hundred forty-nine".