42643719 has 8 divisors (see below), whose sum is σ = 63175920. Its totient is φ = 28429128.

The previous prime is 42643703. The next prime is 42643729. The reversal of 42643719 is 91734624.

42643719 is a `hidden beast` number, since 4 + 2 + 643 + 7 + 1 + 9 = 666.

It is not a de Polignac number, because 42643719 - 2⁴ = 42643703 is a prime.

It is a super-2 number, since 2×42643719² = 3636973540301922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42643729) 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 in 7 ways as a sum of consecutive naturals, for example, 789672 + ... + 789725.

It is an arithmetic number, because the mean of its divisors is an integer number (7896990).

Almost surely, 2^42643719 is an apocalyptic number.

42643719 is a deficient number, since it is larger than the sum of its proper divisors (20532201).

42643719 is a wasteful number, since it uses less digits than its factorization.

42643719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579406 (or 1579400 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42643719 is about 6530.2158463561. The cubic root of 42643719 is about 349.3695289310.

The spelling of 42643719 in words is "forty-two million, six hundred forty-three thousand, seven hundred nineteen".