42984589 has 4 divisors (see below), whose sum is σ = 43003324. Its totient is φ = 42965856.

The previous prime is 42984581. The next prime is 42984647. The reversal of 42984589 is 98548924.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7784100 + 35200489 = 2790^2 + 5933^2 .

It is a 3-Lehmer number, since φ(42984589) divides (42984589-1)³.

It is a cyclic number.

It is not a de Polignac number, because 42984589 - 2³ = 42984581 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 (42984581) 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, 5352 + ... + 10705.

It is an arithmetic number, because the mean of its divisors is an integer number (10750831).

It is a Poulet number, since it divides 2^42984588-1.

Almost surely, 2^42984589 is an apocalyptic number.

It is an amenable number.

42984589 is a deficient number, since it is larger than the sum of its proper divisors (18735).

42984589 is a wasteful number, since it uses less digits than its factorization.

42984589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18734.

The product of its digits is 829440, while the sum is 49.

The square root of 42984589 is about 6556.2633412638. The cubic root of 42984589 is about 350.2979476520.

The spelling of 42984589 in words is "forty-two million, nine hundred eighty-four thousand, five hundred eighty-nine".