42936289 has 4 divisors (see below), whose sum is σ = 46839600. Its totient is φ = 39032980.

The previous prime is 42936259. The next prime is 42936293. The reversal of 42936289 is 98263924.

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 42936289 - 2⁷ = 42936161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42936259) 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, 1951639 + ... + 1951660.

It is an arithmetic number, because the mean of its divisors is an integer number (11709900).

Almost surely, 2^42936289 is an apocalyptic number.

It is an amenable number.

42936289 is a deficient number, since it is larger than the sum of its proper divisors (3903311).

42936289 is a wasteful number, since it uses less digits than its factorization.

42936289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903310.

The product of its digits is 186624, while the sum is 43.

The square root of 42936289 is about 6552.5788053254. The cubic root of 42936289 is about 350.1666933860.

The spelling of 42936289 in words is "forty-two million, nine hundred thirty-six thousand, two hundred eighty-nine".