138133901 has 2 divisors, whose sum is σ = 138133902. Its totient is φ = 138133900.

The previous prime is 138133843. The next prime is 138133907. The reversal of 138133901 is 109331831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 17023876 = 11005^2 + 4126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138133901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138133907) 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, 69066950 + 69066951.

It is an arithmetic number, because the mean of its divisors is an integer number (69066951).

Almost surely, 2^138133901 is an apocalyptic number.

It is an amenable number.

138133901 is a deficient number, since it is larger than the sum of its proper divisors (1).

138133901 is an equidigital number, since it uses as much as digits as its factorization.

138133901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 138133901 is about 11753.0379476968. The cubic root of 138133901 is about 516.9320097105.

The spelling of 138133901 in words is "one hundred thirty-eight million, one hundred thirty-three thousand, nine hundred one".