138532603 has 4 divisors (see below), whose sum is σ = 151126488. Its totient is φ = 125938720.

The previous prime is 138532577. The next prime is 138532607. The reversal of 138532603 is 306235831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138532603 - 2⁵ = 138532571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138532607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6296926 + ... + 6296947.

It is an arithmetic number, because the mean of its divisors is an integer number (37781622).

Almost surely, 2^138532603 is an apocalyptic number.

138532603 is a deficient number, since it is larger than the sum of its proper divisors (12593885).

138532603 is a wasteful number, since it uses less digits than its factorization.

138532603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12593884.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 138532603 is about 11769.9873831708. The cubic root of 138532603 is about 517.4288798932.

The spelling of 138532603 in words is "one hundred thirty-eight million, five hundred thirty-two thousand, six hundred three".