42903439 has 2 divisors, whose sum is σ = 42903440. Its totient is φ = 42903438.

The previous prime is 42903409. The next prime is 42903451. The reversal of 42903439 is 93430924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42903439 - 2⁵ = 42903407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42903409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21451719 + 21451720.

It is an arithmetic number, because the mean of its divisors is an integer number (21451720).

Almost surely, 2^42903439 is an apocalyptic number.

42903439 is a deficient number, since it is larger than the sum of its proper divisors (1).

42903439 is an equidigital number, since it uses as much as digits as its factorization.

42903439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 42903439 is about 6550.0716789971. The cubic root of 42903439 is about 350.0773679305.

The spelling of 42903439 in words is "forty-two million, nine hundred three thousand, four hundred thirty-nine".