140735509 has 2 divisors, whose sum is σ = 140735510. Its totient is φ = 140735508.

The previous prime is 140735477. The next prime is 140735533. The reversal of 140735509 is 905537041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122434225 + 18301284 = 11065^2 + 4278^2 .

It is a cyclic number.

It is not a de Polignac number, because 140735509 - 2⁵ = 140735477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140735599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70367754 + 70367755.

It is an arithmetic number, because the mean of its divisors is an integer number (70367755).

Almost surely, 2^140735509 is an apocalyptic number.

It is an amenable number.

140735509 is a deficient number, since it is larger than the sum of its proper divisors (1).

140735509 is an equidigital number, since it uses as much as digits as its factorization.

140735509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 140735509 is about 11863.1997791490. The cubic root of 140735509 is about 520.1571381607.

The spelling of 140735509 in words is "one hundred forty million, seven hundred thirty-five thousand, five hundred nine".