42724905829 has 2 divisors, whose sum is σ = 42724905830. Its totient is φ = 42724905828.

The previous prime is 42724905791. The next prime is 42724905851. The reversal of 42724905829 is 92850942724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34384284900 + 8340620929 = 185430^2 + 91327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42724905829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42724905889) 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, 21362452914 + 21362452915.

It is an arithmetic number, because the mean of its divisors is an integer number (21362452915).

Almost surely, 2^42724905829 is an apocalyptic number.

It is an amenable number.

42724905829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42724905829 is an equidigital number, since it uses as much as digits as its factorization.

42724905829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 42724905829 in words is "forty-two billion, seven hundred twenty-four million, nine hundred five thousand, eight hundred twenty-nine".