404130609 has 9 divisors (see below), whose sum is σ = 583831339. Its totient is φ = 269380200.

The previous prime is 404130527. The next prime is 404130611. The reversal of 404130609 is 906031404.

The square root of 404130609 is 20103.

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

404130609 is a `hidden beast` number, since 40 + 4 + 13 + 0 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162639009 + 241491600 = 12753^2 + 15540^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 404130609 - 2²⁵ = 370576177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404130679) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 56959 + ... + 63659.

Almost surely, 2^404130609 is an apocalyptic number.

404130609 is the 20103-rd square number.

404130609 is the 10052-nd centered octagonal number.

It is an amenable number.

404130609 is a deficient number, since it is larger than the sum of its proper divisors (179700730).

404130609 is an frugal number, since it uses more digits than its factorization.

404130609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13408 (or 6704 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The cubic root of 404130609 is about 739.3338349850. Note that the first 3 decimals are identical.

The spelling of 404130609 in words is "four hundred four million, one hundred thirty thousand, six hundred nine".