539631 has 12 divisors (see below), whose sum is σ = 825552. Its totient is φ = 338496.

The previous prime is 539629. The next prime is 539633. The reversal of 539631 is 136935.

It is an interprime number because it is at equal distance from previous prime (539629) and next prime (539633).

It is not a de Polignac number, because 539631 - 2¹ = 539629 is a prime.

It is a super-2 number, since 2×539631² = 582403232322, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 539595 and 539604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1611 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2⁵³⁹⁶³¹ is an apocalyptic number.

539631 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

539631 is a deficient number, since it is larger than the sum of its proper divisors (285921).

539631 is a wasteful number, since it uses less digits than its factorization.

539631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550 (or 3547 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 539631 is about 734.5958072301. The cubic root of 539631 is about 81.4139757509.

The spelling of 539631 in words is "five hundred thirty-nine thousand, six hundred thirty-one".