42719481979 has 2 divisors, whose sum is σ = 42719481980. Its totient is φ = 42719481978.

The previous prime is 42719481943. The next prime is 42719481989. The reversal of 42719481979 is 97918491724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42719481979 - 2⁷ = 42719481851 is a prime.

It is not a weakly prime, because it can be changed into another prime (42719481989) 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, 21359740989 + 21359740990.

It is an arithmetic number, because the mean of its divisors is an integer number (21359740990).

Almost surely, 2^42719481979 is an apocalyptic number.

42719481979 is a deficient number, since it is larger than the sum of its proper divisors (1).

42719481979 is an equidigital number, since it uses as much as digits as its factorization.

42719481979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 61.

The spelling of 42719481979 in words is "forty-two billion, seven hundred nineteen million, four hundred eighty-one thousand, nine hundred seventy-nine".