42091967 has 2 divisors, whose sum is σ = 42091968. Its totient is φ = 42091966.

The previous prime is 42091943. The next prime is 42091993. The reversal of 42091967 is 76919024.

42091967 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 a de Polignac number, because none of the positive numbers 2^k-42091967 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42091967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42091937) 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, 21045983 + 21045984.

It is an arithmetic number, because the mean of its divisors is an integer number (21045984).

Almost surely, 2^42091967 is an apocalyptic number.

42091967 is a deficient number, since it is larger than the sum of its proper divisors (1).

42091967 is an equidigital number, since it uses as much as digits as its factorization.

42091967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 42091967 is about 6487.8322265607. The cubic root of 42091967 is about 347.8561936098.

The spelling of 42091967 in words is "forty-two million, ninety-one thousand, nine hundred sixty-seven".