140923309 has 2 divisors, whose sum is σ = 140923310. Its totient is φ = 140923308.

The previous prime is 140923291. The next prime is 140923327. The reversal of 140923309 is 903329041.

It is a balanced prime because it is at equal distance from previous prime (140923291) and next prime (140923327).

It can be written as a sum of positive squares in only one way, i.e., 139476100 + 1447209 = 11810^2 + 1203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140923309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140923339) 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, 70461654 + 70461655.

It is an arithmetic number, because the mean of its divisors is an integer number (70461655).

Almost surely, 2^140923309 is an apocalyptic number.

It is an amenable number.

140923309 is a deficient number, since it is larger than the sum of its proper divisors (1).

140923309 is an equidigital number, since it uses as much as digits as its factorization.

140923309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 140923309 is about 11871.1123741628. The cubic root of 140923309 is about 520.3884043430.

The spelling of 140923309 in words is "one hundred forty million, nine hundred twenty-three thousand, three hundred nine".