43098509 has 4 divisors (see below), whose sum is σ = 43174560. Its totient is φ = 43022460.

The previous prime is 43098493. The next prime is 43098521. The reversal of 43098509 is 90589034.

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 a cyclic number.

It is not a de Polignac number, because 43098509 - 2⁴ = 43098493 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43098569) 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, 37169 + ... + 38310.

It is an arithmetic number, because the mean of its divisors is an integer number (10793640).

Almost surely, 2^43098509 is an apocalyptic number.

It is an amenable number.

43098509 is a deficient number, since it is larger than the sum of its proper divisors (76051).

43098509 is an equidigital number, since it uses as much as digits as its factorization.

43098509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76050.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 43098509 is about 6564.9454681665. The cubic root of 43098509 is about 350.6071339700.

The spelling of 43098509 in words is "forty-three million, ninety-eight thousand, five hundred nine".