138017853 has 12 divisors (see below), whose sum is σ = 199496700. Its totient is φ = 91948416.

The previous prime is 138017851. The next prime is 138017863. The reversal of 138017853 is 358710831.

It can be written as a sum of positive squares in 2 ways, for example, as 19686969 + 118330884 = 4437^2 + 10878^2 .

It is not a de Polignac number, because 138017853 - 2¹ = 138017851 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138017851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11173 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (16624725).

Almost surely, 2^138017853 is an apocalyptic number.

It is an amenable number.

138017853 is a deficient number, since it is larger than the sum of its proper divisors (61478847).

138017853 is a wasteful number, since it uses less digits than its factorization.

138017853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10588 (or 10585 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 138017853 is about 11748.0999740384. The cubic root of 138017853 is about 516.7872088267.

The spelling of 138017853 in words is "one hundred thirty-eight million, seventeen thousand, eight hundred fifty-three".