140744209 has 2 divisors, whose sum is σ = 140744210. Its totient is φ = 140744208.

The previous prime is 140744161. The next prime is 140744237. The reversal of 140744209 is 902447041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115089984 + 25654225 = 10728^2 + 5065^2 .

It is a cyclic number.

It is not a de Polignac number, because 140744209 - 2¹³ = 140736017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140744239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70372104 + 70372105.

It is an arithmetic number, because the mean of its divisors is an integer number (70372105).

Almost surely, 2^140744209 is an apocalyptic number.

It is an amenable number.

140744209 is a deficient number, since it is larger than the sum of its proper divisors (1).

140744209 is an equidigital number, since it uses as much as digits as its factorization.

140744209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 140744209 is about 11863.5664536429. The cubic root of 140744209 is about 520.1678563130.

The spelling of 140744209 in words is "one hundred forty million, seven hundred forty-four thousand, two hundred nine".