42440719 has 2 divisors, whose sum is σ = 42440720. Its totient is φ = 42440718.

The previous prime is 42440707. The next prime is 42440743. The reversal of 42440719 is 91704424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42440719 - 2¹⁷ = 42309647 is a prime.

It is a super-2 number, since 2×42440719² = 3602429258473922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220359 + 21220360.

It is an arithmetic number, because the mean of its divisors is an integer number (21220360).

Almost surely, 2^42440719 is an apocalyptic number.

42440719 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440719 is an equidigital number, since it uses as much as digits as its factorization.

42440719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 42440719 is about 6514.6541734769. The cubic root of 42440719 is about 348.8142705169.

The spelling of 42440719 in words is "forty-two million, four hundred forty thousand, seven hundred nineteen".