138270697 has 2 divisors, whose sum is σ = 138270698. Its totient is φ = 138270696.

The previous prime is 138270679. The next prime is 138270701. The reversal of 138270697 is 796072831.

It is a happy number.

Together with previous prime (138270679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113827561 + 24443136 = 10669^2 + 4944^2 .

It is a cyclic number.

It is not a de Polignac number, because 138270697 - 2²³ = 129882089 is a prime.

It is not a weakly prime, because it can be changed into another prime (138270607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69135348 + 69135349.

It is an arithmetic number, because the mean of its divisors is an integer number (69135349).

Almost surely, 2^138270697 is an apocalyptic number.

It is an amenable number.

138270697 is a deficient number, since it is larger than the sum of its proper divisors (1).

138270697 is an equidigital number, since it uses as much as digits as its factorization.

138270697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 138270697 is about 11758.8561093331. The cubic root of 138270697 is about 517.1025951604.

The spelling of 138270697 in words is "one hundred thirty-eight million, two hundred seventy thousand, six hundred ninety-seven".