138300157 has 2 divisors, whose sum is σ = 138300158. Its totient is φ = 138300156.

The previous prime is 138300139. The next prime is 138300167. The reversal of 138300157 is 751003831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138156516 + 143641 = 11754^2 + 379^2 .

It is an emirp because it is prime and its reverse (751003831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138300157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138300137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69150078 + 69150079.

It is an arithmetic number, because the mean of its divisors is an integer number (69150079).

Almost surely, 2^138300157 is an apocalyptic number.

It is an amenable number.

138300157 is a deficient number, since it is larger than the sum of its proper divisors (1).

138300157 is an equidigital number, since it uses as much as digits as its factorization.

138300157 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 138300157 is about 11760.1087154839. The cubic root of 138300157 is about 517.1393172353.

Adding to 138300157 its reverse (751003831), we get a palindrome (889303988).

The spelling of 138300157 in words is "one hundred thirty-eight million, three hundred thousand, one hundred fifty-seven".