42840439079 has 4 divisors (see below), whose sum is σ = 43256365776. Its totient is φ = 42424512384.

The previous prime is 42840439049. The next prime is 42840439099. The reversal of 42840439079 is 97093404824.

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 42840439079 - 2¹² = 42840434983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840439049) 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, 207963194 + ... + 207963399.

It is an arithmetic number, because the mean of its divisors is an integer number (10814091444).

Almost surely, 2^42840439079 is an apocalyptic number.

42840439079 is a deficient number, since it is larger than the sum of its proper divisors (415926697).

42840439079 is a wasteful number, since it uses less digits than its factorization.

42840439079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415926696.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 42840439079 in words is "forty-two billion, eight hundred forty million, four hundred thirty-nine thousand, seventy-nine".