43201609 has 4 divisors (see below), whose sum is σ = 47129040. Its totient is φ = 39274180.

The previous prime is 43201591. The next prime is 43201621. The reversal of 43201609 is 90610234.

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 not a de Polignac number, because 43201609 - 2¹³ = 43193417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43201679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1963699 + ... + 1963720.

It is an arithmetic number, because the mean of its divisors is an integer number (11782260).

Almost surely, 2^43201609 is an apocalyptic number.

It is an amenable number.

43201609 is a deficient number, since it is larger than the sum of its proper divisors (3927431).

43201609 is a wasteful number, since it uses less digits than its factorization.

43201609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927430.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 43201609 is about 6572.7930896994. The cubic root of 43201609 is about 350.8864847764.

It can be divided in two parts, 4320 and 1609, that added together give a square (5929 = 77²).

The spelling of 43201609 in words is "forty-three million, two hundred one thousand, six hundred nine".