138748601 has 2 divisors, whose sum is σ = 138748602. Its totient is φ = 138748600.

The previous prime is 138748567. The next prime is 138748609. The reversal of 138748601 is 106847831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127351225 + 11397376 = 11285^2 + 3376^2 .

It is an emirp because it is prime and its reverse (106847831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138748601 - 2¹⁸ = 138486457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (138748609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69374300 + 69374301.

It is an arithmetic number, because the mean of its divisors is an integer number (69374301).

Almost surely, 2^138748601 is an apocalyptic number.

It is an amenable number.

138748601 is a deficient number, since it is larger than the sum of its proper divisors (1).

138748601 is an equidigital number, since it uses as much as digits as its factorization.

138748601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 138748601 is about 11779.1596049973. The cubic root of 138748601 is about 517.6976627509.

The spelling of 138748601 in words is "one hundred thirty-eight million, seven hundred forty-eight thousand, six hundred one".