138689853 has 8 divisors (see below), whose sum is σ = 187453248. Its totient is φ = 91193184.

The previous prime is 138689843. The next prime is 138689879. The reversal of 138689853 is 358986831.

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

It is not a de Polignac number, because 138689853 - 2²⁶ = 71580989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138689796 and 138689805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138689813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316425 + ... + 316862.

It is an arithmetic number, because the mean of its divisors is an integer number (23431656).

Almost surely, 2^138689853 is an apocalyptic number.

It is an amenable number.

138689853 is a deficient number, since it is larger than the sum of its proper divisors (48763395).

138689853 is an equidigital number, since it uses as much as digits as its factorization.

138689853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633363.

The product of its digits is 1244160, while the sum is 51.

The square root of 138689853 is about 11776.6656146806. The cubic root of 138689853 is about 517.6245857478.

The spelling of 138689853 in words is "one hundred thirty-eight million, six hundred eighty-nine thousand, eight hundred fifty-three".