545097409 has 4 divisors (see below), whose sum is σ = 547542016. Its totient is φ = 542652804.

The previous prime is 545097391. The next prime is 545097433. The reversal of 545097409 is 904790545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545097409 - 2⁹ = 545096897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545097439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221969 + ... + 1222414.

It is an arithmetic number, because the mean of its divisors is an integer number (136885504).

Almost surely, 2^545097409 is an apocalyptic number.

It is an amenable number.

545097409 is a deficient number, since it is larger than the sum of its proper divisors (2444607).

545097409 is a wasteful number, since it uses less digits than its factorization.

545097409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444606.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 545097409 is about 23347.3212382063. The cubic root of 545097409 is about 816.8795787692.

The spelling of 545097409 in words is "five hundred forty-five million, ninety-seven thousand, four hundred nine".