608409 has 6 divisors (see below), whose sum is σ = 878826. Its totient is φ = 405600.

The previous prime is 608401. The next prime is 608411. The reversal of 608409 is 904806.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 9 = 780^2 + 3^2 .

It is not a de Polignac number, because 608409 - 2³ = 608401 is a prime.

It is a super-2 number, since 2×608409² = 740323022562, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (608401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33792 + ... + 33809.

It is an arithmetic number, because the mean of its divisors is an integer number (146471).

2⁶⁰⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

608409 is a deficient number, since it is larger than the sum of its proper divisors (270417).

608409 is a wasteful number, since it uses less digits than its factorization.

608409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67607 (or 67604 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 608409 is about 780.0057692094. The cubic root of 608409 is about 84.7354636096.

The spelling of 608409 in words is "six hundred eight thousand, four hundred nine".