64539149 has 2 divisors, whose sum is σ = 64539150. Its totient is φ = 64539148.

The previous prime is 64539133. The next prime is 64539161. The reversal of 64539149 is 94193546.

64539149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 4368100 = 7757^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 64539149 - 2⁴ = 64539133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64539109) 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, 32269574 + 32269575.

It is an arithmetic number, because the mean of its divisors is an integer number (32269575).

Almost surely, 2^64539149 is an apocalyptic number.

It is an amenable number.

64539149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64539149 is an equidigital number, since it uses as much as digits as its factorization.

64539149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 64539149 is about 8033.6261426581. The cubic root of 64539149 is about 401.1200876648.

The spelling of 64539149 in words is "sixty-four million, five hundred thirty-nine thousand, one hundred forty-nine".