138785853 has 32 divisors (see below), whose sum is σ = 200143872. Its totient is φ = 85363200.

The previous prime is 138785849. The next prime is 138785863. The reversal of 138785853 is 358587831.

It is a happy number.

It is not a de Polignac number, because 138785853 - 2² = 138785849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138785813) 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 31 ways as a sum of consecutive naturals, for example, 181993 + ... + 182753.

It is an arithmetic number, because the mean of its divisors is an integer number (6254496).

Almost surely, 2^138785853 is an apocalyptic number.

It is an amenable number.

138785853 is a deficient number, since it is larger than the sum of its proper divisors (61358019).

138785853 is a wasteful number, since it uses less digits than its factorization.

138785853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885.

The product of its digits is 806400, while the sum is 48.

The square root of 138785853 is about 11780.7407661827. The cubic root of 138785853 is about 517.7439900592.

The spelling of 138785853 in words is "one hundred thirty-eight million, seven hundred eighty-five thousand, eight hundred fifty-three".