42637189 has 4 divisors (see below), whose sum is σ = 48728224. Its totient is φ = 36546156.

The previous prime is 42637157. The next prime is 42637201. The reversal of 42637189 is 98173624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42637189 - 2⁵ = 42637157 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 (42637129) 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, 3045507 + ... + 3045520.

It is an arithmetic number, because the mean of its divisors is an integer number (12182056).

Almost surely, 2^42637189 is an apocalyptic number.

It is an amenable number.

42637189 is a deficient number, since it is larger than the sum of its proper divisors (6091035).

42637189 is an equidigital number, since it uses as much as digits as its factorization.

42637189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091034.

The product of its digits is 72576, while the sum is 40.

The square root of 42637189 is about 6529.7158437408. The cubic root of 42637189 is about 349.3516951247.

The spelling of 42637189 in words is "forty-two million, six hundred thirty-seven thousand, one hundred eighty-nine".