545361409 has 2 divisors, whose sum is σ = 545361410. Its totient is φ = 545361408.

The previous prime is 545361373. The next prime is 545361419. The reversal of 545361409 is 904163545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508637809 + 36723600 = 22553^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 545361409 - 2⁷ = 545361281 is a prime.

It is not a weakly prime, because it can be changed into another prime (545361419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272680704 + 272680705.

It is an arithmetic number, because the mean of its divisors is an integer number (272680705).

Almost surely, 2^545361409 is an apocalyptic number.

It is an amenable number.

545361409 is a deficient number, since it is larger than the sum of its proper divisors (1).

545361409 is an equidigital number, since it uses as much as digits as its factorization.

545361409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 545361409 is about 23352.9743073554. The cubic root of 545361409 is about 817.0114337363.

It can be divided in two parts, 54536 and 1409, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 545361409 in words is "five hundred forty-five million, three hundred sixty-one thousand, four hundred nine".