140446861 has 2 divisors, whose sum is σ = 140446862. Its totient is φ = 140446860.

The previous prime is 140446849. The next prime is 140446907. The reversal of 140446861 is 168644041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 60684100 = 8931^2 + 7790^2 .

It is an emirp because it is prime and its reverse (168644041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140446861 - 2⁵ = 140446829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140446811) 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, 70223430 + 70223431.

It is an arithmetic number, because the mean of its divisors is an integer number (70223431).

Almost surely, 2^140446861 is an apocalyptic number.

It is an amenable number.

140446861 is a deficient number, since it is larger than the sum of its proper divisors (1).

140446861 is an equidigital number, since it uses as much as digits as its factorization.

140446861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 140446861 is about 11851.0278457187. The cubic root of 140446861 is about 519.8012813176.

The spelling of 140446861 in words is "one hundred forty million, four hundred forty-six thousand, eight hundred sixty-one".