2009433421 has 8 divisors (see below), whose sum is σ = 2032731800. Its totient is φ = 1986223680.

The previous prime is 2009433379. The next prime is 2009433443. The reversal of 2009433421 is 1243349002.

It can be written as a sum of positive squares in 4 ways, for example, as 206496900 + 1802936521 = 14370^2 + 42461^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2009433421 - 2²¹ = 2007336269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009433421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009433451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23995 + ... + 67783.

It is an arithmetic number, because the mean of its divisors is an integer number (254091475).

Almost surely, 2^2009433421 is an apocalyptic number.

It is an amenable number.

2009433421 is a deficient number, since it is larger than the sum of its proper divisors (23298379).

2009433421 is a wasteful number, since it uses less digits than its factorization.

2009433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44319.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2009433421 is about 44826.7043290046. The cubic root of 2009433421 is about 1261.8988378771.

The spelling of 2009433421 in words is "two billion, nine million, four hundred thirty-three thousand, four hundred twenty-one".