42719 has 2 divisors, whose sum is σ = 42720. Its totient is φ = 42718.

The previous prime is 42709. The next prime is 42727. The reversal of 42719 is 91724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42719 - 2⁴ = 42703 is a prime.

It is a super-2 number, since 2×42719² = 3649825922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 42694 and 42703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42709) 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, 21359 + 21360.

It is an arithmetic number, because the mean of its divisors is an integer number (21360).

2⁴²⁷¹⁹ is an apocalyptic number.

42719 is a deficient number, since it is larger than the sum of its proper divisors (1).

42719 is an equidigital number, since it uses as much as digits as its factorization.

42719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 42719 is about 206.6857518069. The cubic root of 42719 is about 34.9574994328.

The spelling of 42719 in words is "forty-two thousand, seven hundred nineteen".