138731353 has 2 divisors, whose sum is σ = 138731354. Its totient is φ = 138731352.

The previous prime is 138731311. The next prime is 138731387. The reversal of 138731353 is 353137831.

It is a happy number.

138731353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (138731387) can be obtained adding 138731353 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115949824 + 22781529 = 10768^2 + 4773^2 .

It is a cyclic number.

It is not a de Polignac number, because 138731353 - 2⁹ = 138730841 is a prime.

It is not a weakly prime, because it can be changed into another prime (138731393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69365676 + 69365677.

It is an arithmetic number, because the mean of its divisors is an integer number (69365677).

Almost surely, 2^138731353 is an apocalyptic number.

It is an amenable number.

138731353 is a deficient number, since it is larger than the sum of its proper divisors (1).

138731353 is an equidigital number, since it uses as much as digits as its factorization.

138731353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 138731353 is about 11778.4274417258. The cubic root of 138731353 is about 517.6762099957.

The spelling of 138731353 in words is "one hundred thirty-eight million, seven hundred thirty-one thousand, three hundred fifty-three".