131548639 has 2 divisors, whose sum is σ = 131548640. Its totient is φ = 131548638.

The previous prime is 131548619. The next prime is 131548649. The reversal of 131548639 is 936845131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131548639 - 2⁷ = 131548511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131548619) 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, 65774319 + 65774320.

It is an arithmetic number, because the mean of its divisors is an integer number (65774320).

Almost surely, 2^131548639 is an apocalyptic number.

131548639 is a deficient number, since it is larger than the sum of its proper divisors (1).

131548639 is an equidigital number, since it uses as much as digits as its factorization.

131548639 is an odious number, because the sum of its binary digits is odd.

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

The square root of 131548639 is about 11469.4655062910. The cubic root of 131548639 is about 508.5833284597.

The spelling of 131548639 in words is "one hundred thirty-one million, five hundred forty-eight thousand, six hundred thirty-nine".