42719121479 has 2 divisors, whose sum is σ = 42719121480. Its totient is φ = 42719121478.

The previous prime is 42719121433. The next prime is 42719121539. The reversal of 42719121479 is 97412191724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42719121479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42719123479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21359560739 + 21359560740.

It is an arithmetic number, because the mean of its divisors is an integer number (21359560740).

Almost surely, 2^42719121479 is an apocalyptic number.

42719121479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42719121479 is an equidigital number, since it uses as much as digits as its factorization.

42719121479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The spelling of 42719121479 in words is "forty-two billion, seven hundred nineteen million, one hundred twenty-one thousand, four hundred seventy-nine".