138507203 has 2 divisors, whose sum is σ = 138507204. Its totient is φ = 138507202.

The previous prime is 138507199. The next prime is 138507221. The reversal of 138507203 is 302705831.

It is a weak prime.

It is an emirp because it is prime and its reverse (302705831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138507203 - 2² = 138507199 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138507223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69253601 + 69253602.

It is an arithmetic number, because the mean of its divisors is an integer number (69253602).

Almost surely, 2^138507203 is an apocalyptic number.

138507203 is a deficient number, since it is larger than the sum of its proper divisors (1).

138507203 is an equidigital number, since it uses as much as digits as its factorization.

138507203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 138507203 is about 11768.9083181067. The cubic root of 138507203 is about 517.3972543731.

The spelling of 138507203 in words is "one hundred thirty-eight million, five hundred seven thousand, two hundred three".