418609 has 3 divisors (see below), whose sum is σ = 419257. Its totient is φ = 417962.

The previous prime is 418603. The next prime is 418631. The reversal of 418609 is 906814.

The square root of 418609 is 647.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 418609 - 2³ = 418601 is a prime.

It is a Duffinian number.

418609 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (418601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 324 + ... + 970.

2⁴¹⁸⁶⁰⁹ is an apocalyptic number.

418609 is the 647-th square number.

418609 is the 324-th centered octagonal number.

It is an amenable number.

418609 is a deficient number, since it is larger than the sum of its proper divisors (648).

418609 is an frugal number, since it uses more digits than its factorization.

418609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The cubic root of 418609 is about 74.8059576598.

The spelling of 418609 in words is "four hundred eighteen thousand, six hundred nine".