131948779 has 2 divisors, whose sum is σ = 131948780. Its totient is φ = 131948778.

The previous prime is 131948777. The next prime is 131948801. The reversal of 131948779 is 977849131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131948779 - 2¹ = 131948777 is a prime.

Together with 131948777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131948777) 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, 65974389 + 65974390.

It is an arithmetic number, because the mean of its divisors is an integer number (65974390).

Almost surely, 2^131948779 is an apocalyptic number.

131948779 is a deficient number, since it is larger than the sum of its proper divisors (1).

131948779 is an equidigital number, since it uses as much as digits as its factorization.

131948779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 131948779 is about 11486.8959688856. The cubic root of 131948779 is about 509.0984700958.

The spelling of 131948779 in words is "one hundred thirty-one million, nine hundred forty-eight thousand, seven hundred seventy-nine".