138655453 has 2 divisors, whose sum is σ = 138655454. Its totient is φ = 138655452.

The previous prime is 138655427. The next prime is 138655457. The reversal of 138655453 is 354556831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79334649 + 59320804 = 8907^2 + 7702^2 .

It is a cyclic number.

It is not a de Polignac number, because 138655453 - 2⁵ = 138655421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138655457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69327726 + 69327727.

It is an arithmetic number, because the mean of its divisors is an integer number (69327727).

Almost surely, 2^138655453 is an apocalyptic number.

It is an amenable number.

138655453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138655453 is an equidigital number, since it uses as much as digits as its factorization.

138655453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 40.

The square root of 138655453 is about 11775.2050088311. The cubic root of 138655453 is about 517.5817857934.

The spelling of 138655453 in words is "one hundred thirty-eight million, six hundred fifty-five thousand, four hundred fifty-three".