138650437 has 2 divisors, whose sum is σ = 138650438. Its totient is φ = 138650436.

The previous prime is 138650387. The next prime is 138650459. The reversal of 138650437 is 734056831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 25462116 = 10639^2 + 5046^2 .

It is a cyclic number.

It is not a de Polignac number, because 138650437 - 2¹⁵ = 138617669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138650396 and 138650405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138650737) 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, 69325218 + 69325219.

It is an arithmetic number, because the mean of its divisors is an integer number (69325219).

Almost surely, 2^138650437 is an apocalyptic number.

It is an amenable number.

138650437 is a deficient number, since it is larger than the sum of its proper divisors (1).

138650437 is an equidigital number, since it uses as much as digits as its factorization.

138650437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 138650437 is about 11774.9920169824. The cubic root of 138650437 is about 517.5755443715.

The spelling of 138650437 in words is "one hundred thirty-eight million, six hundred fifty thousand, four hundred thirty-seven".