545749 has 2 divisors, whose sum is σ = 545750. Its totient is φ = 545748.

The previous prime is 545747. The next prime is 545759. The reversal of 545749 is 947545.

545749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338724 + 207025 = 582^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 545749 - 2¹ = 545747 is a prime.

Together with 545747, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272874 + 272875.

It is an arithmetic number, because the mean of its divisors is an integer number (272875).

2⁵⁴⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

545749 is a deficient number, since it is larger than the sum of its proper divisors (1).

545749 is an equidigital number, since it uses as much as digits as its factorization.

545749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 545749 is about 738.7482656494. The cubic root of 545749 is about 81.7204939232.

It can be divided in two parts, 5 and 45749, that added together give a palindrome (45754).

The spelling of 545749 in words is "five hundred forty-five thousand, seven hundred forty-nine".