138303637 has 2 divisors, whose sum is σ = 138303638. Its totient is φ = 138303636.

The previous prime is 138303631. The next prime is 138303661. The reversal of 138303637 is 736303831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79459396 + 58844241 = 8914^2 + 7671^2 .

It is an emirp because it is prime and its reverse (736303831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138303637 - 2⁷ = 138303509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138303631) 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, 69151818 + 69151819.

It is an arithmetic number, because the mean of its divisors is an integer number (69151819).

Almost surely, 2^138303637 is an apocalyptic number.

It is an amenable number.

138303637 is a deficient number, since it is larger than the sum of its proper divisors (1).

138303637 is an equidigital number, since it uses as much as digits as its factorization.

138303637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 138303637 is about 11760.2566723690. The cubic root of 138303637 is about 517.1436547327.

The spelling of 138303637 in words is "one hundred thirty-eight million, three hundred three thousand, six hundred thirty-seven".