42678719 has 4 divisors (see below), whose sum is σ = 42700296. Its totient is φ = 42657144.

The previous prime is 42678697. The next prime is 42678737. The reversal of 42678719 is 91787624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42678719 - 2⁸ = 42678463 is a prime.

It is a super-2 number, since 2×42678719² = 3642946110961922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42678719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42678319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7484 + ... + 11889.

It is an arithmetic number, because the mean of its divisors is an integer number (10675074).

Almost surely, 2^42678719 is an apocalyptic number.

42678719 is a deficient number, since it is larger than the sum of its proper divisors (21577).

42678719 is a wasteful number, since it uses less digits than its factorization.

42678719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21576.

The product of its digits is 169344, while the sum is 44.

The square root of 42678719 is about 6532.8951468702. The cubic root of 42678719 is about 349.4650849312.

The spelling of 42678719 in words is "forty-two million, six hundred seventy-eight thousand, seven hundred nineteen".