539997 has 4 divisors (see below), whose sum is σ = 720000.
Its totient is φ = 359996.
The previous prime is 539993. The next prime is 540041. The reversal of 539997 is 799935.
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 a cyclic number.
It is not a de Polignac number, because 539997 - 22 = 539993 is a prime.
It is a D-number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (539993) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89997 + ... + 90002.
It is an arithmetic number, because the mean of its divisors is an integer number (180000).
2539997 is an apocalyptic number.
It is an amenable number.
539997 is a deficient number, since it is larger than the sum of its proper divisors (180003).
539997 is a wasteful number, since it uses less digits than its factorization.
539997 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 180002.
The product of its digits is 76545, while the sum is 42.
The square root of 539997 is about 734.8448815907.
The cubic root of 539997 is about 81.4323776966.
The spelling of 539997 in words is "five hundred thirty-nine thousand, nine hundred ninety-seven".