601609 has 4 divisors (see below), whose sum is σ = 603460. Its totient is φ = 599760.

The previous prime is 601607. The next prime is 601631. The reversal of 601609 is 906106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906106 = 2 ⋅453053.

It can be written as a sum of positive squares in 2 ways, for example, as 16384 + 585225 = 128^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 601609 - 2¹ = 601607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 601609.

It is not an unprimeable number, because it can be changed into a prime (601607) 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, 294 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (150865).

2⁶⁰¹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

601609 is a deficient number, since it is larger than the sum of its proper divisors (1851).

601609 is a wasteful number, since it uses less digits than its factorization.

601609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 601609 is about 775.6345789094. The cubic root of 601609 is about 84.4185927458.

The spelling of 601609 in words is "six hundred one thousand, six hundred nine".