6539149 has 2 divisors, whose sum is σ = 6539150. Its totient is φ = 6539148.

The previous prime is 6539129. The next prime is 6539167. The reversal of 6539149 is 9419356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6538249 + 900 = 2557^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 6539149 - 2¹³ = 6530957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6539119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269574 + 3269575.

It is an arithmetic number, because the mean of its divisors is an integer number (3269575).

Almost surely, 2^6539149 is an apocalyptic number.

It is an amenable number.

6539149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6539149 is an equidigital number, since it uses as much as digits as its factorization.

6539149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 37.

The square root of 6539149 is about 2557.1759814295. The cubic root of 6539149 is about 186.9994852570. Note that the first 3 decimals are identical.

The spelling of 6539149 in words is "six million, five hundred thirty-nine thousand, one hundred forty-nine".