138305093 has 2 divisors, whose sum is σ = 138305094. Its totient is φ = 138305092.

The previous prime is 138305087. The next prime is 138305099. The reversal of 138305093 is 390503831.

138305093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (138305087) and next prime (138305099).

It can be written as a sum of positive squares in only one way, i.e., 137898049 + 407044 = 11743^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 138305093 - 2⁴ = 138305077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138305099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69152546 + 69152547.

It is an arithmetic number, because the mean of its divisors is an integer number (69152547).

Almost surely, 2^138305093 is an apocalyptic number.

It is an amenable number.

138305093 is a deficient number, since it is larger than the sum of its proper divisors (1).

138305093 is an equidigital number, since it uses as much as digits as its factorization.

138305093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 138305093 is about 11760.3185756169. The cubic root of 138305093 is about 517.1454694801.

The spelling of 138305093 in words is "one hundred thirty-eight million, three hundred five thousand, ninety-three".