544136809 has 2 divisors, whose sum is σ = 544136810. Its totient is φ = 544136808.

The previous prime is 544136759. The next prime is 544136819. The reversal of 544136809 is 908631445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460231209 + 83905600 = 21453^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 544136809 - 2¹³ = 544128617 is a prime.

It is a super-3 number, since 3×544136809³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (544136819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272068404 + 272068405.

It is an arithmetic number, because the mean of its divisors is an integer number (272068405).

Almost surely, 2^544136809 is an apocalyptic number.

It is an amenable number.

544136809 is a deficient number, since it is larger than the sum of its proper divisors (1).

544136809 is an equidigital number, since it uses as much as digits as its factorization.

544136809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 544136809 is about 23326.7402137547. The cubic root of 544136809 is about 816.3994468968.

The spelling of 544136809 in words is "five hundred forty-four million, one hundred thirty-six thousand, eight hundred nine".