138501757 has 2 divisors, whose sum is σ = 138501758. Its totient is φ = 138501756.

The previous prime is 138501739. The next prime is 138501793. The reversal of 138501757 is 757105831.

138501757 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., 138438756 + 63001 = 11766^2 + 251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138501757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138501257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69250878 + 69250879.

It is an arithmetic number, because the mean of its divisors is an integer number (69250879).

Almost surely, 2^138501757 is an apocalyptic number.

It is an amenable number.

138501757 is a deficient number, since it is larger than the sum of its proper divisors (1).

138501757 is an equidigital number, since it uses as much as digits as its factorization.

138501757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 138501757 is about 11768.6769434801. The cubic root of 138501757 is about 517.3904730594.

The spelling of 138501757 in words is "one hundred thirty-eight million, five hundred one thousand, seven hundred fifty-seven".