140164209 has 8 divisors (see below), whose sum is σ = 207650720. Its totient is φ = 93442788.

The previous prime is 140164207. The next prime is 140164223. The reversal of 140164209 is 902461041.

140164209 is a `hidden beast` number, since 14 + 0 + 1 + 642 + 0 + 9 = 666.

140164209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140164209 - 2¹ = 140164207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5191267 = 140164209 / (1 + 4 + 0 + 1 + 6 + 4 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140164207) 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, 2595607 + ... + 2595660.

It is an arithmetic number, because the mean of its divisors is an integer number (25956340).

Almost surely, 2^140164209 is an apocalyptic number.

It is an amenable number.

140164209 is a deficient number, since it is larger than the sum of its proper divisors (67486511).

140164209 is an equidigital number, since it uses as much as digits as its factorization.

140164209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191276 (or 5191270 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 140164209 is about 11839.0966293886. The cubic root of 140164209 is about 519.4523437840.

It can be divided in two parts, 14016 and 4209, that added together give a square (18225 = 135²).

The spelling of 140164209 in words is "one hundred forty million, one hundred sixty-four thousand, two hundred nine".