42819827 has 2 divisors, whose sum is σ = 42819828. Its totient is φ = 42819826.

The previous prime is 42819823. The next prime is 42819851. The reversal of 42819827 is 72891824.

42819827 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 42819827 - 2² = 42819823 is a prime.

It is not a weakly prime, because it can be changed into another prime (42819823) 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, 21409913 + 21409914.

It is an arithmetic number, because the mean of its divisors is an integer number (21409914).

Almost surely, 2^42819827 is an apocalyptic number.

42819827 is a deficient number, since it is larger than the sum of its proper divisors (1).

42819827 is an equidigital number, since it uses as much as digits as its factorization.

42819827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 42819827 is about 6543.6860407572. The cubic root of 42819827 is about 349.8498049440.

The spelling of 42819827 in words is "forty-two million, eight hundred nineteen thousand, eight hundred twenty-seven".