545240639 has 2 divisors, whose sum is σ = 545240640. Its totient is φ = 545240638.

The previous prime is 545240581. The next prime is 545240651. The reversal of 545240639 is 936042545.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 545240639 - 2²⁴ = 528463423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545240659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272620319 + 272620320.

It is an arithmetic number, because the mean of its divisors is an integer number (272620320).

Almost surely, 2^545240639 is an apocalyptic number.

545240639 is a deficient number, since it is larger than the sum of its proper divisors (1).

545240639 is an equidigital number, since it uses as much as digits as its factorization.

545240639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 545240639 is about 23350.3884121871. The cubic root of 545240639 is about 816.9511203651.

The spelling of 545240639 in words is "five hundred forty-five million, two hundred forty thousand, six hundred thirty-nine".