545684 has 6 divisors (see below), whose sum is σ = 954954. Its totient is φ = 272840.

The previous prime is 545663. The next prime is 545711. The reversal of 545684 is 486545.

It can be written as a sum of positive squares in only one way, i.e., 334084 + 211600 = 578^2 + 460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 545684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68207 + ... + 68214.

It is an arithmetic number, because the mean of its divisors is an integer number (159159).

2⁵⁴⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

545684 is a deficient number, since it is larger than the sum of its proper divisors (409270).

545684 is a wasteful number, since it uses less digits than its factorization.

545684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136425 (or 136423 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 545684 is about 738.7042710043. The cubic root of 545684 is about 81.7172494262.

It can be divided in two parts, 54 and 5684, that multiplied together give a triangular number (306936 = T₇₈₃).

The spelling of 545684 in words is "five hundred forty-five thousand, six hundred eighty-four".