140009 has 2 divisors, whose sum is σ = 140010. Its totient is φ = 140008.

The previous prime is 139999. The next prime is 140053. The reversal of 140009 is 900041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120409 + 19600 = 347^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 140009 - 2⁸ = 139753 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 139975 and 140002.

It is not a weakly prime, because it can be changed into another prime (140069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70004 + 70005.

It is an arithmetic number, because the mean of its divisors is an integer number (70005).

2¹⁴⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

140009 is a deficient number, since it is larger than the sum of its proper divisors (1).

140009 is an equidigital number, since it uses as much as digits as its factorization.

140009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 140009 is about 374.1777652400. The cubic root of 140009 is about 51.9260536720.

The spelling of 140009 in words is "one hundred forty thousand, nine".