42399829 has 2 divisors, whose sum is σ = 42399830. Its totient is φ = 42399828.

The previous prime is 42399821. The next prime is 42399857. The reversal of 42399829 is 92899324.

42399829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41254929 + 1144900 = 6423^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 42399829 - 2³ = 42399821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42399821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21199914 + 21199915.

It is an arithmetic number, because the mean of its divisors is an integer number (21199915).

Almost surely, 2^42399829 is an apocalyptic number.

It is an amenable number.

42399829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42399829 is an equidigital number, since it uses as much as digits as its factorization.

42399829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 42399829 is about 6511.5151078685. The cubic root of 42399829 is about 348.7022114776.

The spelling of 42399829 in words is "forty-two million, three hundred ninety-nine thousand, eight hundred twenty-nine".