138856097 has 2 divisors, whose sum is σ = 138856098. Its totient is φ = 138856096.

The previous prime is 138856061. The next prime is 138856103. The reversal of 138856097 is 790658831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128845201 + 10010896 = 11351^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 138856097 - 2⁸ = 138855841 is a prime.

It is not a weakly prime, because it can be changed into another prime (138856007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69428048 + 69428049.

It is an arithmetic number, because the mean of its divisors is an integer number (69428049).

Almost surely, 2^138856097 is an apocalyptic number.

It is an amenable number.

138856097 is a deficient number, since it is larger than the sum of its proper divisors (1).

138856097 is an equidigital number, since it uses as much as digits as its factorization.

138856097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 138856097 is about 11783.7216956274. The cubic root of 138856097 is about 517.8313243084.

The spelling of 138856097 in words is "one hundred thirty-eight million, eight hundred fifty-six thousand, ninety-seven".