138499093 has 2 divisors, whose sum is σ = 138499094. Its totient is φ = 138499092.

The previous prime is 138499043. The next prime is 138499111. The reversal of 138499093 is 390994831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138344644 + 154449 = 11762^2 + 393^2 .

It is an emirp because it is prime and its reverse (390994831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138499093 - 2¹³ = 138490901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138499043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69249546 + 69249547.

It is an arithmetic number, because the mean of its divisors is an integer number (69249547).

Almost surely, 2^138499093 is an apocalyptic number.

It is an amenable number.

138499093 is a deficient number, since it is larger than the sum of its proper divisors (1).

138499093 is an equidigital number, since it uses as much as digits as its factorization.

138499093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 138499093 is about 11768.5637611392. The cubic root of 138499093 is about 517.3871558041.

The spelling of 138499093 in words is "one hundred thirty-eight million, four hundred ninety-nine thousand, ninety-three".