140301809 has 2 divisors, whose sum is σ = 140301810. Its totient is φ = 140301808.

The previous prime is 140301793. The next prime is 140301829. The reversal of 140301809 is 908103041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83631025 + 56670784 = 9145^2 + 7528^2 .

It is a cyclic number.

It is not a de Polignac number, because 140301809 - 2⁴ = 140301793 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 (140301829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70150904 + 70150905.

It is an arithmetic number, because the mean of its divisors is an integer number (70150905).

Almost surely, 2^140301809 is an apocalyptic number.

It is an amenable number.

140301809 is a deficient number, since it is larger than the sum of its proper divisors (1).

140301809 is an equidigital number, since it uses as much as digits as its factorization.

140301809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 140301809 is about 11844.9064580519. The cubic root of 140301809 is about 519.6222712952.

The spelling of 140301809 in words is "one hundred forty million, three hundred one thousand, eight hundred nine".