140844149 has 2 divisors, whose sum is σ = 140844150. Its totient is φ = 140844148.

The previous prime is 140844107. The next prime is 140844173. The reversal of 140844149 is 941448041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 1249924 = 11815^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 140844149 - 2¹⁶ = 140778613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140844199) 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, 70422074 + 70422075.

It is an arithmetic number, because the mean of its divisors is an integer number (70422075).

Almost surely, 2^140844149 is an apocalyptic number.

It is an amenable number.

140844149 is a deficient number, since it is larger than the sum of its proper divisors (1).

140844149 is an equidigital number, since it uses as much as digits as its factorization.

140844149 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 35.

The square root of 140844149 is about 11867.7777616536. Note that the first 4 decimals coincide. The cubic root of 140844149 is about 520.2909478801.

The spelling of 140844149 in words is "one hundred forty million, eight hundred forty-four thousand, one hundred forty-nine".