545504389 has 2 divisors, whose sum is σ = 545504390. Its totient is φ = 545504388.

The previous prime is 545504387. The next prime is 545504417. The reversal of 545504389 is 983405545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483252289 + 62252100 = 21983^2 + 7890^2 .

It is a cyclic number.

It is not a de Polignac number, because 545504389 - 2¹ = 545504387 is a prime.

Together with 545504387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545504387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272752194 + 272752195.

It is an arithmetic number, because the mean of its divisors is an integer number (272752195).

Almost surely, 2^545504389 is an apocalyptic number.

It is an amenable number.

545504389 is a deficient number, since it is larger than the sum of its proper divisors (1).

545504389 is an equidigital number, since it uses as much as digits as its factorization.

545504389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 43.

The square root of 545504389 is about 23356.0353870258. The cubic root of 545504389 is about 817.0828274247.

The spelling of 545504389 in words is "five hundred forty-five million, five hundred four thousand, three hundred eighty-nine".