42423947 has 2 divisors, whose sum is σ = 42423948. Its totient is φ = 42423946.

The previous prime is 42423943. The next prime is 42423967. The reversal of 42423947 is 74932424.

42423947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42423947 - 2² = 42423943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42423943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211973 + 21211974.

It is an arithmetic number, because the mean of its divisors is an integer number (21211974).

Almost surely, 2^42423947 is an apocalyptic number.

42423947 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423947 is an equidigital number, since it uses as much as digits as its factorization.

42423947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 42423947 is about 6513.3667945234. The cubic root of 42423947 is about 348.7683155637.

The spelling of 42423947 in words is "forty-two million, four hundred twenty-three thousand, nine hundred forty-seven".