539669 has 4 divisors (see below), whose sum is σ = 581196. Its totient is φ = 498144.

The previous prime is 539663. The next prime is 539677. The reversal of 539669 is 966935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966935 = 5 ⋅193387.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 302500 = 487^2 + 550^2 .

It is a cyclic number.

It is not a de Polignac number, because 539669 - 2⁴ = 539653 is a prime.

It is a super-2 number, since 2×539669² = 582485259122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539663) 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, 20744 + ... + 20769.

It is an arithmetic number, because the mean of its divisors is an integer number (145299).

2⁵³⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

539669 is a deficient number, since it is larger than the sum of its proper divisors (41527).

539669 is a wasteful number, since it uses less digits than its factorization.

539669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41526.

The product of its digits is 43740, while the sum is 38.

The square root of 539669 is about 734.6216713384. The cubic root of 539669 is about 81.4158867225.

The spelling of 539669 in words is "five hundred thirty-nine thousand, six hundred sixty-nine".