131839719449 has 2 divisors, whose sum is σ = 131839719450. Its totient is φ = 131839719448.

The previous prime is 131839719437. The next prime is 131839719493. The reversal of 131839719449 is 944917938131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131121479449 + 718240000 = 362107^2 + 26800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131839719449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131839719749) by changing a digit.

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 as a sum of consecutive naturals, namely, 65919859724 + 65919859725.

It is an arithmetic number, because the mean of its divisors is an integer number (65919859725).

Almost surely, 2^131839719449 is an apocalyptic number.

It is an amenable number.

131839719449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131839719449 is an equidigital number, since it uses as much as digits as its factorization.

131839719449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The spelling of 131839719449 in words is "one hundred thirty-one billion, eight hundred thirty-nine million, seven hundred nineteen thousand, four hundred forty-nine".