138937061 has 2 divisors, whose sum is σ = 138937062. Its totient is φ = 138937060.

The previous prime is 138937049. The next prime is 138937091. The reversal of 138937061 is 160739831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100620961 + 38316100 = 10031^2 + 6190^2 .

It is a cyclic number.

It is not a de Polignac number, because 138937061 - 2¹⁸ = 138674917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138937021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69468530 + 69468531.

It is an arithmetic number, because the mean of its divisors is an integer number (69468531).

Almost surely, 2^138937061 is an apocalyptic number.

It is an amenable number.

138937061 is a deficient number, since it is larger than the sum of its proper divisors (1).

138937061 is an equidigital number, since it uses as much as digits as its factorization.

138937061 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 38.

The square root of 138937061 is about 11787.1566121775. The cubic root of 138937061 is about 517.9319501847.

The spelling of 138937061 in words is "one hundred thirty-eight million, nine hundred thirty-seven thousand, sixty-one".