138522497 has 2 divisors, whose sum is σ = 138522498. Its totient is φ = 138522496.

The previous prime is 138522467. The next prime is 138522529. The reversal of 138522497 is 794225831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135862336 + 2660161 = 11656^2 + 1631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138522497 is a prime.

It is not a weakly prime, because it can be changed into another prime (138522467) 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, 69261248 + 69261249.

It is an arithmetic number, because the mean of its divisors is an integer number (69261249).

Almost surely, 2^138522497 is an apocalyptic number.

It is an amenable number.

138522497 is a deficient number, since it is larger than the sum of its proper divisors (1).

138522497 is an equidigital number, since it uses as much as digits as its factorization.

138522497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 138522497 is about 11769.5580630710. The cubic root of 138522497 is about 517.4162973836.

The spelling of 138522497 in words is "one hundred thirty-eight million, five hundred twenty-two thousand, four hundred ninety-seven".