138258203 has 4 divisors (see below), whose sum is σ = 138730368. Its totient is φ = 137786040.

The previous prime is 138258187. The next prime is 138258223. The reversal of 138258203 is 302852831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302852831 = 2657 ⋅113983.

It is a cyclic number.

It is not a de Polignac number, because 138258203 - 2⁴ = 138258187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138258203.

It is not an unprimeable number, because it can be changed into a prime (138258223) 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, 235643 + ... + 236228.

It is an arithmetic number, because the mean of its divisors is an integer number (34682592).

Almost surely, 2^138258203 is an apocalyptic number.

138258203 is a deficient number, since it is larger than the sum of its proper divisors (472165).

138258203 is an equidigital number, since it uses as much as digits as its factorization.

138258203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472164.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 138258203 is about 11758.3248381732. The cubic root of 138258203 is about 517.0870197358.

The spelling of 138258203 in words is "one hundred thirty-eight million, two hundred fifty-eight thousand, two hundred three".