140138717 has 2 divisors, whose sum is σ = 140138718. Its totient is φ = 140138716.

The previous prime is 140138681. The next prime is 140138723. The reversal of 140138717 is 717831041.

It is a happy number.

140138717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 12313081 = 11306^2 + 3509^2 .

It is an emirp because it is prime and its reverse (717831041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140138717 - 2¹⁰ = 140137693 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 (140138797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70069358 + 70069359.

It is an arithmetic number, because the mean of its divisors is an integer number (70069359).

Almost surely, 2^140138717 is an apocalyptic number.

It is an amenable number.

140138717 is a deficient number, since it is larger than the sum of its proper divisors (1).

140138717 is an equidigital number, since it uses as much as digits as its factorization.

140138717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 140138717 is about 11838.0199780200. The cubic root of 140138717 is about 519.4208505279.

Adding to 140138717 its reverse (717831041), we get a palindrome (857969758).

The spelling of 140138717 in words is "one hundred forty million, one hundred thirty-eight thousand, seven hundred seventeen".