138030049 has 2 divisors, whose sum is σ = 138030050. Its totient is φ = 138030048.

The previous prime is 138030031. The next prime is 138030059. The reversal of 138030049 is 940030831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91011600 + 47018449 = 9540^2 + 6857^2 .

It is an emirp because it is prime and its reverse (940030831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138030049 - 2⁷ = 138029921 is a prime.

It is equal to p_7807105 and since 138030049 and 7807105 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 138029999 and 138030026.

It is not a weakly prime, because it can be changed into another prime (138030019) 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, 69015024 + 69015025.

It is an arithmetic number, because the mean of its divisors is an integer number (69015025).

Almost surely, 2^138030049 is an apocalyptic number.

It is an amenable number.

138030049 is a deficient number, since it is larger than the sum of its proper divisors (1).

138030049 is an equidigital number, since it uses as much as digits as its factorization.

138030049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 138030049 is about 11748.6190252302. The cubic root of 138030049 is about 516.8024304110.

The spelling of 138030049 in words is "one hundred thirty-eight million, thirty thousand, forty-nine".