42919187 has 2 divisors, whose sum is σ = 42919188. Its totient is φ = 42919186.

The previous prime is 42919181. The next prime is 42919189. The reversal of 42919187 is 78191924.

42919187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42919187 - 2¹⁰ = 42918163 is a prime.

It is a super-2 number, since 2×42919187² = 3684113225481938, which contains 22 as substring.

Together with 42919189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42919181) 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, 21459593 + 21459594.

It is an arithmetic number, because the mean of its divisors is an integer number (21459594).

Almost surely, 2^42919187 is an apocalyptic number.

42919187 is a deficient number, since it is larger than the sum of its proper divisors (1).

42919187 is an equidigital number, since it uses as much as digits as its factorization.

42919187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 42919187 is about 6551.2736929547. The cubic root of 42919187 is about 350.1201954530.

The spelling of 42919187 in words is "forty-two million, nine hundred nineteen thousand, one hundred eighty-seven".