42339929 has 2 divisors, whose sum is σ = 42339930. Its totient is φ = 42339928.

The previous prime is 42339889. The next prime is 42339931. The reversal of 42339929 is 92993324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34245904 + 8094025 = 5852^2 + 2845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42339929 is a prime.

Together with 42339931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42339949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21169964 + 21169965.

It is an arithmetic number, because the mean of its divisors is an integer number (21169965).

Almost surely, 2^42339929 is an apocalyptic number.

It is an amenable number.

42339929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42339929 is an equidigital number, since it uses as much as digits as its factorization.

42339929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 42339929 is about 6506.9139382660. The cubic root of 42339929 is about 348.5379253881.

The spelling of 42339929 in words is "forty-two million, three hundred thirty-nine thousand, nine hundred twenty-nine".