5439509 has 2 divisors, whose sum is σ = 5439510. Its totient is φ = 5439508.

The previous prime is 5439479. The next prime is 5439521. The reversal of 5439509 is 9059345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 10609 = 2330^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 5439509 - 2⁸ = 5439253 is a prime.

It is a super-2 number, since 2×5439509² = 59176516322162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5439409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2719754 + 2719755.

It is an arithmetic number, because the mean of its divisors is an integer number (2719755).

Almost surely, 2^5439509 is an apocalyptic number.

It is an amenable number.

5439509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5439509 is an equidigital number, since it uses as much as digits as its factorization.

5439509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 5439509 is about 2332.2754983063. The cubic root of 5439509 is about 175.8678954444.

The spelling of 5439509 in words is "five million, four hundred thirty-nine thousand, five hundred nine".