138705001 has 2 divisors, whose sum is σ = 138705002. Its totient is φ = 138705000.

The previous prime is 138704977. The next prime is 138705029. The reversal of 138705001 is 100507831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86936976 + 51768025 = 9324^2 + 7195^2 .

It is an emirp because it is prime and its reverse (100507831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138705001 - 2¹¹ = 138702953 is a prime.

It is not a weakly prime, because it can be changed into another prime (138705041) 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, 69352500 + 69352501.

It is an arithmetic number, because the mean of its divisors is an integer number (69352501).

Almost surely, 2^138705001 is an apocalyptic number.

It is an amenable number.

138705001 is a deficient number, since it is larger than the sum of its proper divisors (1).

138705001 is an equidigital number, since it uses as much as digits as its factorization.

138705001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 138705001 is about 11777.3087333227. The cubic root of 138705001 is about 517.6434304136.

The spelling of 138705001 in words is "one hundred thirty-eight million, seven hundred five thousand, one".