545020405 has 4 divisors (see below), whose sum is σ = 654024492. Its totient is φ = 436016320.

The previous prime is 545020379. The next prime is 545020433. The reversal of 545020405 is 504020545.

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 304956369 + 240064036 = 17463^2 + 15494^2 .

It is not a de Polignac number, because 545020405 - 2¹³ = 545012213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545020405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54502036 + ... + 54502045.

It is an arithmetic number, because the mean of its divisors is an integer number (163506123).

Almost surely, 2^545020405 is an apocalyptic number.

It is an amenable number.

545020405 is a deficient number, since it is larger than the sum of its proper divisors (109004087).

545020405 is a wasteful number, since it uses less digits than its factorization.

545020405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109004086.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 545020405 is about 23345.6720828508. The cubic root of 545020405 is about 816.8411110529.

The spelling of 545020405 in words is "five hundred forty-five million, twenty thousand, four hundred five".