42333989 has 4 divisors (see below), whose sum is σ = 42418656. Its totient is φ = 42249324.

The previous prime is 42333953. The next prime is 42334009. The reversal of 42333989 is 98933324.

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 42333989 - 2¹² = 42329893 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 (42333089) 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, 41579 + ... + 42584.

It is an arithmetic number, because the mean of its divisors is an integer number (10604664).

Almost surely, 2^42333989 is an apocalyptic number.

It is an amenable number.

42333989 is a deficient number, since it is larger than the sum of its proper divisors (84667).

42333989 is an equidigital number, since it uses as much as digits as its factorization.

42333989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84666.

The product of its digits is 139968, while the sum is 41.

The square root of 42333989 is about 6506.4574846840. The cubic root of 42333989 is about 348.5216254702.

The spelling of 42333989 in words is "forty-two million, three hundred thirty-three thousand, nine hundred eighty-nine".