140665829 has 2 divisors, whose sum is σ = 140665830. Its totient is φ = 140665828.

The previous prime is 140665807. The next prime is 140665843. The reversal of 140665829 is 928566041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130005604 + 10660225 = 11402^2 + 3265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140665829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140665849) 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, 70332914 + 70332915.

It is an arithmetic number, because the mean of its divisors is an integer number (70332915).

Almost surely, 2^140665829 is an apocalyptic number.

It is an amenable number.

140665829 is a deficient number, since it is larger than the sum of its proper divisors (1).

140665829 is an equidigital number, since it uses as much as digits as its factorization.

140665829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 140665829 is about 11860.2626024890. The cubic root of 140665829 is about 520.0712784441.

The spelling of 140665829 in words is "one hundred forty million, six hundred sixty-five thousand, eight hundred twenty-nine".