138235653 has 48 divisors (see below), whose sum is σ = 221981760. Its totient is φ = 85660416.

The previous prime is 138235633. The next prime is 138235661. The reversal of 138235653 is 356532831.

138235653 is a `hidden beast` number, since 13 + 82 + 3 + 565 + 3 = 666.

It is not a de Polignac number, because 138235653 - 2¹² = 138231557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138235633) 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 47 ways as a sum of consecutive naturals, for example, 450126 + ... + 450432.

It is an arithmetic number, because the mean of its divisors is an integer number (4624620).

Almost surely, 2^138235653 is an apocalyptic number.

It is an amenable number.

138235653 is a deficient number, since it is larger than the sum of its proper divisors (83746107).

138235653 is a wasteful number, since it uses less digits than its factorization.

138235653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 436 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 138235653 is about 11757.3659039770. The cubic root of 138235653 is about 517.0589058011.

The spelling of 138235653 in words is "one hundred thirty-eight million, two hundred thirty-five thousand, six hundred fifty-three".