140280809 has 2 divisors, whose sum is σ = 140280810. Its totient is φ = 140280808.

The previous prime is 140280773. The next prime is 140280839. The reversal of 140280809 is 908082041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113209600 + 27071209 = 10640^2 + 5203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140280809 is a prime.

It is not a weakly prime, because it can be changed into another prime (140280839) 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, 70140404 + 70140405.

It is an arithmetic number, because the mean of its divisors is an integer number (70140405).

Almost surely, 2^140280809 is an apocalyptic number.

It is an amenable number.

140280809 is a deficient number, since it is larger than the sum of its proper divisors (1).

140280809 is an equidigital number, since it uses as much as digits as its factorization.

140280809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 140280809 is about 11844.0199678994. The cubic root of 140280809 is about 519.5963447771.

The spelling of 140280809 in words is "one hundred forty million, two hundred eighty thousand, eight hundred nine".