140664449 has 2 divisors, whose sum is σ = 140664450. Its totient is φ = 140664448.

The previous prime is 140664439. The next prime is 140664463. The reversal of 140664449 is 944466041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104182849 + 36481600 = 10207^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 140664449 - 2⁸ = 140664193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140664439) 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 as a sum of consecutive naturals, namely, 70332224 + 70332225.

It is an arithmetic number, because the mean of its divisors is an integer number (70332225).

Almost surely, 2^140664449 is an apocalyptic number.

It is an amenable number.

140664449 is a deficient number, since it is larger than the sum of its proper divisors (1).

140664449 is an equidigital number, since it uses as much as digits as its factorization.

140664449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 140664449 is about 11860.2044248824. The cubic root of 140664449 is about 520.0695777214.

The spelling of 140664449 in words is "one hundred forty million, six hundred sixty-four thousand, four hundred forty-nine".