42343439 has 2 divisors, whose sum is σ = 42343440. Its totient is φ = 42343438.

The previous prime is 42343421. The next prime is 42343471. The reversal of 42343439 is 93434324.

It is an a-pointer prime, because the next prime (42343471) can be obtained adding 42343439 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42343439 - 2⁸ = 42343183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42340439) 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, 21171719 + 21171720.

It is an arithmetic number, because the mean of its divisors is an integer number (21171720).

Almost surely, 2^42343439 is an apocalyptic number.

42343439 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343439 is an equidigital number, since it uses as much as digits as its factorization.

42343439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 32.

The square root of 42343439 is about 6507.1836457872. The cubic root of 42343439 is about 348.5475564412.

The spelling of 42343439 in words is "forty-two million, three hundred forty-three thousand, four hundred thirty-nine".