140812209 has 8 divisors (see below), whose sum is σ = 208610720. Its totient is φ = 93874788.

The previous prime is 140812193. The next prime is 140812213. The reversal of 140812209 is 902218041.

140812209 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 140812209 - 2⁴ = 140812193 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: 5215267 = 140812209 / (1 + 4 + 0 + 8 + 1 + 2 + 2 + 0 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140812709) 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, 2607607 + ... + 2607660.

It is an arithmetic number, because the mean of its divisors is an integer number (26076340).

Almost surely, 2^140812209 is an apocalyptic number.

It is an amenable number.

140812209 is a deficient number, since it is larger than the sum of its proper divisors (67798511).

140812209 is an equidigital number, since it uses as much as digits as its factorization.

140812209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215276 (or 5215270 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 140812209 is about 11866.4320248337. The cubic root of 140812209 is about 520.2516151629.

It can be divided in two parts, 14081 and 2209, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 140812209 in words is "one hundred forty million, eight hundred twelve thousand, two hundred nine".