138891353 has 8 divisors (see below), whose sum is σ = 145297800. Its totient is φ = 132592768.

The previous prime is 138891317. The next prime is 138891359. The reversal of 138891353 is 353198831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9909904 + 128981449 = 3148^2 + 11357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138891353 - 2¹² = 138887257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138891353.

It is not an unprimeable number, because it can be changed into a prime (138891359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24326 + ... + 29487.

It is an arithmetic number, because the mean of its divisors is an integer number (18162225).

Almost surely, 2^138891353 is an apocalyptic number.

It is an amenable number.

138891353 is a deficient number, since it is larger than the sum of its proper divisors (6406447).

138891353 is an equidigital number, since it uses as much as digits as its factorization.

138891353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53931.

The product of its digits is 77760, while the sum is 41.

The square root of 138891353 is about 11785.2175626927. The cubic root of 138891353 is about 517.8751469340.

The spelling of 138891353 in words is "one hundred thirty-eight million, eight hundred ninety-one thousand, three hundred fifty-three".