138285061 has 2 divisors, whose sum is σ = 138285062. Its totient is φ = 138285060.

The previous prime is 138285023. The next prime is 138285071. The reversal of 138285061 is 160582831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73788100 + 64496961 = 8590^2 + 8031^2 .

It is a cyclic number.

It is not a de Polignac number, because 138285061 - 2¹³ = 138276869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138285011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69142530 + 69142531.

It is an arithmetic number, because the mean of its divisors is an integer number (69142531).

Almost surely, 2^138285061 is an apocalyptic number.

It is an amenable number.

138285061 is a deficient number, since it is larger than the sum of its proper divisors (1).

138285061 is an equidigital number, since it uses as much as digits as its factorization.

138285061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 138285061 is about 11759.4668671671. The cubic root of 138285061 is about 517.1205006280.

The spelling of 138285061 in words is "one hundred thirty-eight million, two hundred eighty-five thousand, sixty-one".