138423053 has 2 divisors, whose sum is σ = 138423054. Its totient is φ = 138423052.

The previous prime is 138422987. The next prime is 138423073. The reversal of 138423053 is 350324831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100440484 + 37982569 = 10022^2 + 6163^2 .

It is a cyclic number.

It is not a de Polignac number, because 138423053 - 2¹⁰ = 138422029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138423073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69211526 + 69211527.

It is an arithmetic number, because the mean of its divisors is an integer number (69211527).

Almost surely, 2^138423053 is an apocalyptic number.

It is an amenable number.

138423053 is a deficient number, since it is larger than the sum of its proper divisors (1).

138423053 is an equidigital number, since it uses as much as digits as its factorization.

138423053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 138423053 is about 11765.3326769794. The cubic root of 138423053 is about 517.2924516424.

Adding to 138423053 its reverse (350324831), we get a palindrome (488747884).

The spelling of 138423053 in words is "one hundred thirty-eight million, four hundred twenty-three thousand, fifty-three".