5398509 has 4 divisors (see below), whose sum is σ = 7198016. Its totient is φ = 3599004.

The previous prime is 5398507. The next prime is 5398513. The reversal of 5398509 is 9058935.

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 5398509 - 2¹ = 5398507 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5398501) 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, 899749 + ... + 899754.

It is an arithmetic number, because the mean of its divisors is an integer number (1799504).

Almost surely, 2^5398509 is an apocalyptic number.

It is an amenable number.

5398509 is a deficient number, since it is larger than the sum of its proper divisors (1799507).

5398509 is a wasteful number, since it uses less digits than its factorization.

5398509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799506.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 5398509 is about 2323.4691734559. The cubic root of 5398509 is about 175.4249157307.

The spelling of 5398509 in words is "five million, three hundred ninety-eight thousand, five hundred nine".