138914201 has 2 divisors, whose sum is σ = 138914202. Its totient is φ = 138914200.

The previous prime is 138914179. The next prime is 138914213. The reversal of 138914201 is 102419831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 3168400 = 11651^2 + 1780^2 .

It is an emirp because it is prime and its reverse (102419831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138914201 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (138914221) 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 as a sum of consecutive naturals, namely, 69457100 + 69457101.

It is an arithmetic number, because the mean of its divisors is an integer number (69457101).

Almost surely, 2^138914201 is an apocalyptic number.

It is an amenable number.

138914201 is a deficient number, since it is larger than the sum of its proper divisors (1).

138914201 is an equidigital number, since it uses as much as digits as its factorization.

138914201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 138914201 is about 11786.1868727761. The cubic root of 138914201 is about 517.9035426604.

The spelling of 138914201 in words is "one hundred thirty-eight million, nine hundred fourteen thousand, two hundred one".