43421389 has 8 divisors (see below), whose sum is σ = 47486880. Its totient is φ = 39375600.

The previous prime is 43421369. The next prime is 43421393. The reversal of 43421389 is 98312434.

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

It is not a de Polignac number, because 43421389 - 2⁹ = 43420877 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 (43421369) 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, 102 + ... + 9319.

It is an arithmetic number, because the mean of its divisors is an integer number (5935860).

Almost surely, 2^43421389 is an apocalyptic number.

It is an amenable number.

43421389 is a deficient number, since it is larger than the sum of its proper divisors (4065491).

43421389 is a wasteful number, since it uses less digits than its factorization.

43421389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851.

The product of its digits is 20736, while the sum is 34.

The square root of 43421389 is about 6589.4907997508. The cubic root of 43421389 is about 351.4805014318.

The spelling of 43421389 in words is "forty-three million, four hundred twenty-one thousand, three hundred eighty-nine".