138399299 has 2 divisors, whose sum is σ = 138399300. Its totient is φ = 138399298.

The previous prime is 138399293. The next prime is 138399323. The reversal of 138399299 is 992993831.

It is a weak prime.

It is an emirp because it is prime and its reverse (992993831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138399299 - 2¹² = 138395203 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138399299.

It is not a weakly prime, because it can be changed into another prime (138399293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69199649 + 69199650.

It is an arithmetic number, because the mean of its divisors is an integer number (69199650).

Almost surely, 2^138399299 is an apocalyptic number.

138399299 is a deficient number, since it is larger than the sum of its proper divisors (1).

138399299 is an equidigital number, since it uses as much as digits as its factorization.

138399299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 53.

The square root of 138399299 is about 11764.3231424507. The cubic root of 138399299 is about 517.2628600689.

The spelling of 138399299 in words is "one hundred thirty-eight million, three hundred ninety-nine thousand, two hundred ninety-nine".