545623 has 12 divisors (see below), whose sum is σ = 631960. Its totient is φ = 466992.

The previous prime is 545621. The next prime is 545641. The reversal of 545623 is 326545.

545623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 545623 - 2¹ = 545621 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11586 + ... + 11632.

2⁵⁴⁵⁶²³ is an apocalyptic number.

545623 is a deficient number, since it is larger than the sum of its proper divisors (86337).

545623 is a wasteful number, since it uses less digits than its factorization.

545623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 79 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 545623 is about 738.6629813386. The cubic root of 545623 is about 81.7142043562.

The spelling of 545623 in words is "five hundred forty-five thousand, six hundred twenty-three".