138873353 has 2 divisors, whose sum is σ = 138873354. Its totient is φ = 138873352.

The previous prime is 138873331. The next prime is 138873401. The reversal of 138873353 is 353378831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127870864 + 11002489 = 11308^2 + 3317^2 .

It is a cyclic number.

It is not a de Polignac number, because 138873353 - 2¹⁶ = 138807817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138873353.

It is not a weakly prime, because it can be changed into another prime (138873253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69436676 + 69436677.

It is an arithmetic number, because the mean of its divisors is an integer number (69436677).

Almost surely, 2^138873353 is an apocalyptic number.

It is an amenable number.

138873353 is a deficient number, since it is larger than the sum of its proper divisors (1).

138873353 is an equidigital number, since it uses as much as digits as its factorization.

138873353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 138873353 is about 11784.4538693993. The cubic root of 138873353 is about 517.8527741580.

The spelling of 138873353 in words is "one hundred thirty-eight million, eight hundred seventy-three thousand, three hundred fifty-three".