544554809 has 2 divisors, whose sum is σ = 544554810. Its totient is φ = 544554808.

The previous prime is 544554781. The next prime is 544554811. The reversal of 544554809 is 908455445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464273209 + 80281600 = 21547^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 544554809 - 2⁸ = 544554553 is a prime.

Together with 544554811, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 544554809.

It is not a weakly prime, because it can be changed into another prime (544554859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272277404 + 272277405.

It is an arithmetic number, because the mean of its divisors is an integer number (272277405).

Almost surely, 2^544554809 is an apocalyptic number.

It is an amenable number.

544554809 is a deficient number, since it is larger than the sum of its proper divisors (1).

544554809 is an equidigital number, since it uses as much as digits as its factorization.

544554809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 544554809 is about 23335.6981682571. The cubic root of 544554809 is about 816.6084431257.

The spelling of 544554809 in words is "five hundred forty-four million, five hundred fifty-four thousand, eight hundred nine".