42429823 has 2 divisors, whose sum is σ = 42429824. Its totient is φ = 42429822.

The previous prime is 42429817. The next prime is 42429847. The reversal of 42429823 is 32892424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42429823 is a prime.

It is a super-2 number, since 2×42429823² = 3600579759622658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42429853) 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, 21214911 + 21214912.

It is an arithmetic number, because the mean of its divisors is an integer number (21214912).

Almost surely, 2^42429823 is an apocalyptic number.

42429823 is a deficient number, since it is larger than the sum of its proper divisors (1).

42429823 is an equidigital number, since it uses as much as digits as its factorization.

42429823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 42429823 is about 6513.8178513066. The cubic root of 42429823 is about 348.7844170673.

The spelling of 42429823 in words is "forty-two million, four hundred twenty-nine thousand, eight hundred twenty-three".