140458609 has 2 divisors, whose sum is σ = 140458610. Its totient is φ = 140458608.

The previous prime is 140458589. The next prime is 140458663. The reversal of 140458609 is 906854041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136235584 + 4223025 = 11672^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 140458609 - 2⁷ = 140458481 is a prime.

It is not a weakly prime, because it can be changed into another prime (140468609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70229304 + 70229305.

It is an arithmetic number, because the mean of its divisors is an integer number (70229305).

Almost surely, 2^140458609 is an apocalyptic number.

It is an amenable number.

140458609 is a deficient number, since it is larger than the sum of its proper divisors (1).

140458609 is an equidigital number, since it uses as much as digits as its factorization.

140458609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 140458609 is about 11851.5234885647. The cubic root of 140458609 is about 519.8157742372.

The spelling of 140458609 in words is "one hundred forty million, four hundred fifty-eight thousand, six hundred nine".