138927853 has 2 divisors, whose sum is σ = 138927854. Its totient is φ = 138927852.

The previous prime is 138927839. The next prime is 138927863. The reversal of 138927853 is 358729831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 27688644 = 10547^2 + 5262^2 .

It is a cyclic number.

It is not a de Polignac number, because 138927853 - 2¹³ = 138919661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138927863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69463926 + 69463927.

It is an arithmetic number, because the mean of its divisors is an integer number (69463927).

Almost surely, 2^138927853 is an apocalyptic number.

It is an amenable number.

138927853 is a deficient number, since it is larger than the sum of its proper divisors (1).

138927853 is an equidigital number, since it uses as much as digits as its factorization.

138927853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 138927853 is about 11786.7660110821. The cubic root of 138927853 is about 517.9205080187.

The spelling of 138927853 in words is "one hundred thirty-eight million, nine hundred twenty-seven thousand, eight hundred fifty-three".