42839679 has 4 divisors (see below), whose sum is σ = 57119576. Its totient is φ = 28559784.

The previous prime is 42839669. The next prime is 42839689. The reversal of 42839679 is 97693824.

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

It is an interprime number because it is at equal distance from previous prime (42839669) and next prime (42839689).

It is not a de Polignac number, because 42839679 - 2⁴ = 42839663 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 (42839659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139944 + ... + 7139949.

It is an arithmetic number, because the mean of its divisors is an integer number (14279894).

Almost surely, 2^42839679 is an apocalyptic number.

42839679 is a deficient number, since it is larger than the sum of its proper divisors (14279897).

42839679 is a wasteful number, since it uses less digits than its factorization.

42839679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279896.

The product of its digits is 653184, while the sum is 48.

The square root of 42839679 is about 6545.2027470507. The cubic root of 42839679 is about 349.9038620306.

The spelling of 42839679 in words is "forty-two million, eight hundred thirty-nine thousand, six hundred seventy-nine".