138740153 has 2 divisors, whose sum is σ = 138740154. Its totient is φ = 138740152.

The previous prime is 138740149. The next prime is 138740171. The reversal of 138740153 is 351047831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90687529 + 48052624 = 9523^2 + 6932^2 .

It is a cyclic number.

It is not a de Polignac number, because 138740153 - 2² = 138740149 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138740113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69370076 + 69370077.

It is an arithmetic number, because the mean of its divisors is an integer number (69370077).

Almost surely, 2^138740153 is an apocalyptic number.

It is an amenable number.

138740153 is a deficient number, since it is larger than the sum of its proper divisors (1).

138740153 is an equidigital number, since it uses as much as digits as its factorization.

138740153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138740153 is about 11778.8010001018. The cubic root of 138740153 is about 517.6871555011.

Adding to 138740153 its reverse (351047831), we get a palindrome (489787984).

The spelling of 138740153 in words is "one hundred thirty-eight million, seven hundred forty thousand, one hundred fifty-three".