138098297 has 2 divisors, whose sum is σ = 138098298. Its totient is φ = 138098296.

The previous prime is 138098287. The next prime is 138098309. The reversal of 138098297 is 792890831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136796416 + 1301881 = 11696^2 + 1141^2 .

It is an emirp because it is prime and its reverse (792890831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138098297 - 2⁸ = 138098041 is a prime.

It is a super-2 number, since 2×138098297² = 38142279268600418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138098287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69049148 + 69049149.

It is an arithmetic number, because the mean of its divisors is an integer number (69049149).

Almost surely, 2^138098297 is an apocalyptic number.

It is an amenable number.

138098297 is a deficient number, since it is larger than the sum of its proper divisors (1).

138098297 is an equidigital number, since it uses as much as digits as its factorization.

138098297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 138098297 is about 11751.5231778693. The cubic root of 138098297 is about 516.8875928352.

The spelling of 138098297 in words is "one hundred thirty-eight million, ninety-eight thousand, two hundred ninety-seven".