140072509 has 2 divisors, whose sum is σ = 140072510. Its totient is φ = 140072508.

The previous prime is 140072501. The next prime is 140072519. The reversal of 140072509 is 905270041.

It is a happy number.

140072509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121771225 + 18301284 = 11035^2 + 4278^2 .

It is a cyclic number.

It is not a de Polignac number, because 140072509 - 2³ = 140072501 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 (140072501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70036254 + 70036255.

It is an arithmetic number, because the mean of its divisors is an integer number (70036255).

Almost surely, 2^140072509 is an apocalyptic number.

It is an amenable number.

140072509 is a deficient number, since it is larger than the sum of its proper divisors (1).

140072509 is an equidigital number, since it uses as much as digits as its factorization.

140072509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 140072509 is about 11835.2232340586. The cubic root of 140072509 is about 519.3390381789.

The spelling of 140072509 in words is "one hundred forty million, seventy-two thousand, five hundred nine".