138000293 has 2 divisors, whose sum is σ = 138000294. Its totient is φ = 138000292.

The previous prime is 138000227. The next prime is 138000307. The reversal of 138000293 is 392000831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114019684 + 23980609 = 10678^2 + 4897^2 .

It is a cyclic number.

It is not a de Polignac number, because 138000293 - 2²² = 133805989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69000146 + 69000147.

It is an arithmetic number, because the mean of its divisors is an integer number (69000147).

Almost surely, 2^138000293 is an apocalyptic number.

It is an amenable number.

138000293 is a deficient number, since it is larger than the sum of its proper divisors (1).

138000293 is an equidigital number, since it uses as much as digits as its factorization.

138000293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 138000293 is about 11747.3525953723. The cubic root of 138000293 is about 516.7652909659.

The spelling of 138000293 in words is "one hundred thirty-eight million, two hundred ninety-three", and thus it is an aban number.