138212803 has 2 divisors, whose sum is σ = 138212804. Its totient is φ = 138212802.

The previous prime is 138212779. The next prime is 138212891. The reversal of 138212803 is 308212831.

It is a weak prime.

It is an emirp because it is prime and its reverse (308212831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138212803 is a prime.

It is not a weakly prime, because it can be changed into another prime (138212003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69106401 + 69106402.

It is an arithmetic number, because the mean of its divisors is an integer number (69106402).

Almost surely, 2^138212803 is an apocalyptic number.

138212803 is a deficient number, since it is larger than the sum of its proper divisors (1).

138212803 is an equidigital number, since it uses as much as digits as its factorization.

138212803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 138212803 is about 11756.3941325561. The cubic root of 138212803 is about 517.0304147261.

Adding to 138212803 its sum of digits (28), we get a palindrome (138212831).

The spelling of 138212803 in words is "one hundred thirty-eight million, two hundred twelve thousand, eight hundred three".