140402209 has 2 divisors, whose sum is σ = 140402210. Its totient is φ = 140402208.

The previous prime is 140402203. The next prime is 140402231. The reversal of 140402209 is 902204041.

It is an a-pointer prime, because the next prime (140402231) can be obtained adding 140402209 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 22353984 = 10865^2 + 4728^2 .

It is a cyclic number.

It is not a de Polignac number, because 140402209 - 2⁵ = 140402177 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140402209.

It is not a weakly prime, because it can be changed into another prime (140402203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70201104 + 70201105.

It is an arithmetic number, because the mean of its divisors is an integer number (70201105).

Almost surely, 2^140402209 is an apocalyptic number.

It is an amenable number.

140402209 is a deficient number, since it is larger than the sum of its proper divisors (1).

140402209 is an equidigital number, since it uses as much as digits as its factorization.

140402209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 140402209 is about 11849.1438087315. The cubic root of 140402209 is about 519.7461890053.

The spelling of 140402209 in words is "one hundred forty million, four hundred two thousand, two hundred nine".