140659549 has 2 divisors, whose sum is σ = 140659550. Its totient is φ = 140659548.

The previous prime is 140659543. The next prime is 140659609. The reversal of 140659549 is 945956041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 710649 = 11830^2 + 843^2 .

It is a cyclic number.

It is not a de Polignac number, because 140659549 - 2¹¹ = 140657501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140659543) 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, 70329774 + 70329775.

It is an arithmetic number, because the mean of its divisors is an integer number (70329775).

Almost surely, 2^140659549 is an apocalyptic number.

It is an amenable number.

140659549 is a deficient number, since it is larger than the sum of its proper divisors (1).

140659549 is an equidigital number, since it uses as much as digits as its factorization.

140659549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 140659549 is about 11859.9978499155. The cubic root of 140659549 is about 520.0635388335.

The spelling of 140659549 in words is "one hundred forty million, six hundred fifty-nine thousand, five hundred forty-nine".