8434509 has 4 divisors (see below), whose sum is σ = 11246016. Its totient is φ = 5623004.

The previous prime is 8434501. The next prime is 8434513. The reversal of 8434509 is 9054348.

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 8434509 - 2³ = 8434501 is a prime.

It is a super-2 number, since 2×8434509² = 142281884142162, which contains 22 as substring.

8434509 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8434509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8434501) 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, 1405749 + ... + 1405754.

It is an arithmetic number, because the mean of its divisors is an integer number (2811504).

Almost surely, 2^8434509 is an apocalyptic number.

It is an amenable number.

8434509 is a deficient number, since it is larger than the sum of its proper divisors (2811507).

8434509 is a wasteful number, since it uses less digits than its factorization.

8434509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811506.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 8434509 is about 2904.2226154343. Note that the first 3 decimals coincide. The cubic root of 8434509 is about 203.5572626294.

The spelling of 8434509 in words is "eight million, four hundred thirty-four thousand, five hundred nine".