43509049 has 2 divisors, whose sum is σ = 43509050. Its totient is φ = 43509048.

The previous prime is 43509047. The next prime is 43509073. The reversal of 43509049 is 94090534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40411449 + 3097600 = 6357^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 43509049 - 2¹ = 43509047 is a prime.

It is a super-3 number, since 3×43509049³ (a number of 24 digits) contains 333 as substring.

Together with 43509047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43509047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21754524 + 21754525.

It is an arithmetic number, because the mean of its divisors is an integer number (21754525).

Almost surely, 2^43509049 is an apocalyptic number.

It is an amenable number.

43509049 is a deficient number, since it is larger than the sum of its proper divisors (1).

43509049 is an equidigital number, since it uses as much as digits as its factorization.

43509049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 43509049 is about 6596.1389463837. The cubic root of 43509049 is about 351.7168678162.

It can be divided in two parts, 4 and 3509049, that added together give a palindrome (3509053).

The spelling of 43509049 in words is "forty-three million, five hundred nine thousand, forty-nine".