42771719 has 2 divisors, whose sum is σ = 42771720. Its totient is φ = 42771718.

The previous prime is 42771683. The next prime is 42771721. The reversal of 42771719 is 91717724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42771719 - 2¹² = 42767623 is a prime.

It is a super-2 number, since 2×42771719² = 3658839892429922, which contains 22 as substring.

Together with 42771721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42771769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385859 + 21385860.

It is an arithmetic number, because the mean of its divisors is an integer number (21385860).

Almost surely, 2^42771719 is an apocalyptic number.

42771719 is a deficient number, since it is larger than the sum of its proper divisors (1).

42771719 is an equidigital number, since it uses as much as digits as its factorization.

42771719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 42771719 is about 6540.0090978530. The cubic root of 42771719 is about 349.7187373010.

The spelling of 42771719 in words is "forty-two million, seven hundred seventy-one thousand, seven hundred nineteen".