138900941 has 2 divisors, whose sum is σ = 138900942. Its totient is φ = 138900940.

The previous prime is 138900913. The next prime is 138900943. The reversal of 138900941 is 149009831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100200100 + 38700841 = 10010^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 138900941 - 2⁶ = 138900877 is a prime.

Together with 138900943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138900943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69450470 + 69450471.

It is an arithmetic number, because the mean of its divisors is an integer number (69450471).

Almost surely, 2^138900941 is an apocalyptic number.

It is an amenable number.

138900941 is a deficient number, since it is larger than the sum of its proper divisors (1).

138900941 is an equidigital number, since it uses as much as digits as its factorization.

138900941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 138900941 is about 11785.6243364533. The cubic root of 138900941 is about 517.8870633769.

The spelling of 138900941 in words is "one hundred thirty-eight million, nine hundred thousand, nine hundred forty-one".