140609 has 8 divisors (see below), whose sum is σ = 164160. Its totient is φ = 117936.

The previous prime is 140603. The next prime is 140611. The reversal of 140609 is 906041.

It is a Cunningham number, because it is equal to 52³+1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140609 - 2⁴ = 140593 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140609.

It is not an unprimeable number, because it can be changed into a prime (140603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182 + ... + 560.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2¹⁴⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

140609 is a deficient number, since it is larger than the sum of its proper divisors (23551).

140609 is an equidigital number, since it uses as much as digits as its factorization.

140609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 140609 is about 374.9786660598. The cubic root of 140609 is about 52.0001232739. Note that the first 3 decimals are identical.

The spelling of 140609 in words is "one hundred forty thousand, six hundred nine".