42169943 has 2 divisors, whose sum is σ = 42169944. Its totient is φ = 42169942.

The previous prime is 42169937. The next prime is 42169997. The reversal of 42169943 is 34996124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42169943 - 2¹⁸ = 41907799 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42169897 and 42169906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42169343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21084971 + 21084972.

It is an arithmetic number, because the mean of its divisors is an integer number (21084972).

Almost surely, 2^42169943 is an apocalyptic number.

42169943 is a deficient number, since it is larger than the sum of its proper divisors (1).

42169943 is an equidigital number, since it uses as much as digits as its factorization.

42169943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 42169943 is about 6493.8388492478. The cubic root of 42169943 is about 348.0708640424.

The spelling of 42169943 in words is "forty-two million, one hundred sixty-nine thousand, nine hundred forty-three".