140118809 has 2 divisors, whose sum is σ = 140118810. Its totient is φ = 140118808.

The previous prime is 140118799. The next prime is 140118817. The reversal of 140118809 is 908811041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135792409 + 4326400 = 11653^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 140118809 - 2⁴ = 140118793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140118509) 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, 70059404 + 70059405.

It is an arithmetic number, because the mean of its divisors is an integer number (70059405).

Almost surely, 2^140118809 is an apocalyptic number.

It is an amenable number.

140118809 is a deficient number, since it is larger than the sum of its proper divisors (1).

140118809 is an equidigital number, since it uses as much as digits as its factorization.

140118809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 140118809 is about 11837.1790980791. The cubic root of 140118809 is about 519.3962531856.

The spelling of 140118809 in words is "one hundred forty million, one hundred eighteen thousand, eight hundred nine".