140909 has 2 divisors, whose sum is σ = 140910. Its totient is φ = 140908.

The previous prime is 140897. The next prime is 140929. The reversal of 140909 is 909041.

140909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126025 + 14884 = 355^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 140909 - 2⁴ = 140893 is a prime.

140909 is a modest number, since divided by 909 gives 14 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70454 + 70455.

It is an arithmetic number, because the mean of its divisors is an integer number (70455).

2¹⁴⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

140909 is a deficient number, since it is larger than the sum of its proper divisors (1).

140909 is an equidigital number, since it uses as much as digits as its factorization.

140909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 140909 is about 375.3784756749. The cubic root of 140909 is about 52.0370790768.

It can be divided in two parts, 140 and 909, that multiplied together give a triangular number (127260 = T₅₀₄).

The spelling of 140909 in words is "one hundred forty thousand, nine hundred nine".