42043423 has 2 divisors, whose sum is σ = 42043424. Its totient is φ = 42043422.

The previous prime is 42043411. The next prime is 42043429. The reversal of 42043423 is 32434024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42043423 - 2⁹ = 42042911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42043394 and 42043403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42043429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021711 + 21021712.

It is an arithmetic number, because the mean of its divisors is an integer number (21021712).

Almost surely, 2^42043423 is an apocalyptic number.

42043423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043423 is an equidigital number, since it uses as much as digits as its factorization.

42043423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 42043423 is about 6484.0899901220. The cubic root of 42043423 is about 347.7224164863.

Adding to 42043423 its reverse (32434024), we get a palindrome (74477447).

The spelling of 42043423 in words is "forty-two million, forty-three thousand, four hundred twenty-three".