138331547 has 2 divisors, whose sum is σ = 138331548. Its totient is φ = 138331546.

The previous prime is 138331541. The next prime is 138331561. The reversal of 138331547 is 745133831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138331547 - 2¹⁰ = 138330523 is a prime.

It is not a weakly prime, because it can be changed into another prime (138331541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69165773 + 69165774.

It is an arithmetic number, because the mean of its divisors is an integer number (69165774).

Almost surely, 2^138331547 is an apocalyptic number.

138331547 is a deficient number, since it is larger than the sum of its proper divisors (1).

138331547 is an equidigital number, since it uses as much as digits as its factorization.

138331547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 138331547 is about 11761.4432362699. The cubic root of 138331547 is about 517.1784393292.

The spelling of 138331547 in words is "one hundred thirty-eight million, three hundred thirty-one thousand, five hundred forty-seven".