4398509 has 4 divisors (see below), whose sum is σ = 4473120. Its totient is φ = 4323900.

The previous prime is 4398503. The next prime is 4398553. The reversal of 4398509 is 9058934.

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 4398509 - 2¹² = 4394413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4398503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37217 + ... + 37334.

It is an arithmetic number, because the mean of its divisors is an integer number (1118280).

Almost surely, 2^4398509 is an apocalyptic number.

It is an amenable number.

4398509 is a deficient number, since it is larger than the sum of its proper divisors (74611).

4398509 is an equidigital number, since it uses as much as digits as its factorization.

4398509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74610.

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

The square root of 4398509 is about 2097.2622630468. The cubic root of 4398509 is about 163.8457428167.

The spelling of 4398509 in words is "four million, three hundred ninety-eight thousand, five hundred nine".