138930541 has 2 divisors, whose sum is σ = 138930542. Its totient is φ = 138930540.

The previous prime is 138930529. The next prime is 138930587. The reversal of 138930541 is 145039831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128913316 + 10017225 = 11354^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 138930541 - 2¹³ = 138922349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138930497 and 138930506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138930521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69465270 + 69465271.

It is an arithmetic number, because the mean of its divisors is an integer number (69465271).

Almost surely, 2^138930541 is an apocalyptic number.

It is an amenable number.

138930541 is a deficient number, since it is larger than the sum of its proper divisors (1).

138930541 is an equidigital number, since it uses as much as digits as its factorization.

138930541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138930541 is about 11786.8800367188. The cubic root of 138930541 is about 517.9238482688.

The spelling of 138930541 in words is "one hundred thirty-eight million, nine hundred thirty thousand, five hundred forty-one".