545434321 has 4 divisors (see below), whose sum is σ = 547155252. Its totient is φ = 543713392.

The previous prime is 545434297. The next prime is 545434343. The reversal of 545434321 is 123434545.

545434321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102921025 + 442513296 = 10145^2 + 21036^2 .

It is a cyclic number.

It is not a de Polignac number, because 545434321 - 2¹¹ = 545432273 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545434361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859990 + ... + 860623.

It is an arithmetic number, because the mean of its divisors is an integer number (136788813).

Almost surely, 2^545434321 is an apocalyptic number.

It is an amenable number.

545434321 is a deficient number, since it is larger than the sum of its proper divisors (1720931).

545434321 is a wasteful number, since it uses less digits than its factorization.

545434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720930.

The product of its digits is 28800, while the sum is 31.

The square root of 545434321 is about 23354.5353411281. The cubic root of 545434321 is about 817.0478421816.

Adding to 545434321 its reverse (123434545), we get a palindrome (668868866).

The spelling of 545434321 in words is "five hundred forty-five million, four hundred thirty-four thousand, three hundred twenty-one".