506909409 has 4 divisors (see below), whose sum is σ = 675879216. Its totient is φ = 337939604.

The previous prime is 506909407. The next prime is 506909411. The reversal of 506909409 is 904909605.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (506909407) and next prime (506909411).

It is a cyclic number.

It is not a de Polignac number, because 506909409 - 2¹ = 506909407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506909407) 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, 84484899 + ... + 84484904.

It is an arithmetic number, because the mean of its divisors is an integer number (168969804).

Almost surely, 2^506909409 is an apocalyptic number.

It is an amenable number.

506909409 is a deficient number, since it is larger than the sum of its proper divisors (168969807).

506909409 is a wasteful number, since it uses less digits than its factorization.

506909409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168969806.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 506909409 is about 22514.6487647487. The cubic root of 506909409 is about 797.3398145925.

The spelling of 506909409 in words is "five hundred six million, nine hundred nine thousand, four hundred nine".