138541307 has 2 divisors, whose sum is σ = 138541308. Its totient is φ = 138541306.

The previous prime is 138541303. The next prime is 138541339. The reversal of 138541307 is 703145831.

It is an a-pointer prime, because the next prime (138541339) can be obtained adding 138541307 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138541307 - 2² = 138541303 is a prime.

It is not a weakly prime, because it can be changed into another prime (138541303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69270653 + 69270654.

It is an arithmetic number, because the mean of its divisors is an integer number (69270654).

Almost surely, 2^138541307 is an apocalyptic number.

138541307 is a deficient number, since it is larger than the sum of its proper divisors (1).

138541307 is an equidigital number, since it uses as much as digits as its factorization.

138541307 is an odious number, because the sum of its binary digits is odd.

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

The square root of 138541307 is about 11770.3571313703. The cubic root of 138541307 is about 517.4397163475.

The spelling of 138541307 in words is "one hundred thirty-eight million, five hundred forty-one thousand, three hundred seven".