42989637 has 8 divisors (see below), whose sum is σ = 58652704. Its totient is φ = 27993168.

The previous prime is 42989623. The next prime is 42989659. The reversal of 42989637 is 73698924.

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

It is not a de Polignac number, because 42989637 - 2⁴ = 42989621 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 (42989677) 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, 166498 + ... + 166755.

It is an arithmetic number, because the mean of its divisors is an integer number (7331588).

Almost surely, 2^42989637 is an apocalyptic number.

It is an amenable number.

42989637 is a deficient number, since it is larger than the sum of its proper divisors (15663067).

42989637 is a wasteful number, since it uses less digits than its factorization.

42989637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333299.

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

The square root of 42989637 is about 6556.6483053463. The cubic root of 42989637 is about 350.3116598131.

The spelling of 42989637 in words is "forty-two million, nine hundred eighty-nine thousand, six hundred thirty-seven".