545617 has 2 divisors, whose sum is σ = 545618. Its totient is φ = 545616.

The previous prime is 545609. The next prime is 545621. The reversal of 545617 is 716545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398161 + 147456 = 631^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 545617 - 2³ = 545609 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (545647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272808 + 272809.

It is an arithmetic number, because the mean of its divisors is an integer number (272809).

2⁵⁴⁵⁶¹⁷ is an apocalyptic number.

It is an amenable number.

545617 is a deficient number, since it is larger than the sum of its proper divisors (1).

545617 is an equidigital number, since it uses as much as digits as its factorization.

545617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 545617 is about 738.6589199353. The cubic root of 545617 is about 81.7139048288.

It can be divided in two parts, 54 and 5617, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 545617 in words is "five hundred forty-five thousand, six hundred seventeen".