43209011 has 2 divisors, whose sum is σ = 43209012. Its totient is φ = 43209010.

The previous prime is 43208993. The next prime is 43209013. The reversal of 43209011 is 11090234.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43209011 - 2¹⁴ = 43192627 is a prime.

Together with 43209013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43209013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21604505 + 21604506.

It is an arithmetic number, because the mean of its divisors is an integer number (21604506).

Almost surely, 2^43209011 is an apocalyptic number.

43209011 is a deficient number, since it is larger than the sum of its proper divisors (1).

43209011 is an equidigital number, since it uses as much as digits as its factorization.

43209011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 43209011 is about 6573.3561443147. The cubic root of 43209011 is about 350.9065234856.

Adding to 43209011 its reverse (11090234), we get a palindrome (54299245).

It can be divided in two parts, 4320 and 9011, that added together give a palindrome (13331).

The spelling of 43209011 in words is "forty-three million, two hundred nine thousand, eleven".