138132949 has 2 divisors, whose sum is σ = 138132950. Its totient is φ = 138132948.

The previous prime is 138132941. The next prime is 138132959. The reversal of 138132949 is 949231831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129618225 + 8514724 = 11385^2 + 2918^2 .

It is an emirp because it is prime and its reverse (949231831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138132949 - 2³ = 138132941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138132941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69066474 + 69066475.

It is an arithmetic number, because the mean of its divisors is an integer number (69066475).

Almost surely, 2^138132949 is an apocalyptic number.

It is an amenable number.

138132949 is a deficient number, since it is larger than the sum of its proper divisors (1).

138132949 is an equidigital number, since it uses as much as digits as its factorization.

138132949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 138132949 is about 11752.9974474599. The cubic root of 138132949 is about 516.9308221662.

The spelling of 138132949 in words is "one hundred thirty-eight million, one hundred thirty-two thousand, nine hundred forty-nine".