140168449 has 4 divisors (see below), whose sum is σ = 140320260. Its totient is φ = 140016640.

The previous prime is 140168443. The next prime is 140168461. The reversal of 140168449 is 944861041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1517824 + 138650625 = 1232^2 + 11775^2 .

It is a cyclic number.

It is not a de Polignac number, because 140168449 - 2¹⁷ = 140037377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140168443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74512 + ... + 76369.

It is an arithmetic number, because the mean of its divisors is an integer number (35080065).

Almost surely, 2^140168449 is an apocalyptic number.

It is an amenable number.

140168449 is a deficient number, since it is larger than the sum of its proper divisors (151811).

140168449 is an equidigital number, since it uses as much as digits as its factorization.

140168449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151810.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 140168449 is about 11839.2756957510. The cubic root of 140168449 is about 519.4575815827.

The spelling of 140168449 in words is "one hundred forty million, one hundred sixty-eight thousand, four hundred forty-nine".