138876601 has 2 divisors, whose sum is σ = 138876602. Its totient is φ = 138876600.

The previous prime is 138876593. The next prime is 138876607. The reversal of 138876601 is 106678831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75690000 + 63186601 = 8700^2 + 7949^2 .

It is a cyclic number.

It is not a de Polignac number, because 138876601 - 2³ = 138876593 is a prime.

It is not a weakly prime, because it can be changed into another prime (138876607) 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, 69438300 + 69438301.

It is an arithmetic number, because the mean of its divisors is an integer number (69438301).

Almost surely, 2^138876601 is an apocalyptic number.

It is an amenable number.

138876601 is a deficient number, since it is larger than the sum of its proper divisors (1).

138876601 is an equidigital number, since it uses as much as digits as its factorization.

138876601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 138876601 is about 11784.5916772708. The cubic root of 138876601 is about 517.8568113441.

The spelling of 138876601 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, six hundred one".