138825397 has 2 divisors, whose sum is σ = 138825398. Its totient is φ = 138825396.

The previous prime is 138825373. The next prime is 138825413. The reversal of 138825397 is 793528831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127441521 + 11383876 = 11289^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 138825397 - 2¹⁹ = 138301109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138825317) 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, 69412698 + 69412699.

It is an arithmetic number, because the mean of its divisors is an integer number (69412699).

Almost surely, 2^138825397 is an apocalyptic number.

It is an amenable number.

138825397 is a deficient number, since it is larger than the sum of its proper divisors (1).

138825397 is an equidigital number, since it uses as much as digits as its factorization.

138825397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 138825397 is about 11782.4189791401. The cubic root of 138825397 is about 517.7931586733.

The spelling of 138825397 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, three hundred ninety-seven".