138631053 has 8 divisors (see below), whose sum is σ = 201645216. Its totient is φ = 84018800.

The previous prime is 138631037. The next prime is 138631111. The reversal of 138631053 is 350136831.

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 138631053 - 2⁴ = 138631037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138631053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138631553) 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, 2100438 + ... + 2100503.

It is an arithmetic number, because the mean of its divisors is an integer number (25205652).

Almost surely, 2^138631053 is an apocalyptic number.

It is an amenable number.

138631053 is a deficient number, since it is larger than the sum of its proper divisors (63014163).

138631053 is a wasteful number, since it uses less digits than its factorization.

138631053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200955.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 138631053 is about 11774.1688878664. The cubic root of 138631053 is about 517.5514233947.

Adding to 138631053 its reverse (350136831), we get a palindrome (488767884).

The spelling of 138631053 in words is "one hundred thirty-eight million, six hundred thirty-one thousand, fifty-three".