42918739 has 8 divisors (see below), whose sum is σ = 45239040. Its totient is φ = 40604616.

The previous prime is 42918731. The next prime is 42918749. The reversal of 42918739 is 93781924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42918739 - 2³ = 42918731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42918695 and 42918704.

It is not an unprimeable number, because it can be changed into a prime (42918731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22314 + ... + 24160.

It is an arithmetic number, because the mean of its divisors is an integer number (5654880).

Almost surely, 2^42918739 is an apocalyptic number.

42918739 is a deficient number, since it is larger than the sum of its proper divisors (2320301).

42918739 is a wasteful number, since it uses less digits than its factorization.

42918739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089.

The product of its digits is 108864, while the sum is 43.

The square root of 42918739 is about 6551.2395010410. The cubic root of 42918739 is about 350.1189772380.

The spelling of 42918739 in words is "forty-two million, nine hundred eighteen thousand, seven hundred thirty-nine".