138810163 has 2 divisors, whose sum is σ = 138810164. Its totient is φ = 138810162.

The previous prime is 138810121. The next prime is 138810209. The reversal of 138810163 is 361018831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138810163 - 2²¹ = 136713011 is a prime.

It is a super-2 number, since 2×138810163² = 38536522704173138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138810263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69405081 + 69405082.

It is an arithmetic number, because the mean of its divisors is an integer number (69405082).

Almost surely, 2^138810163 is an apocalyptic number.

138810163 is a deficient number, since it is larger than the sum of its proper divisors (1).

138810163 is an equidigital number, since it uses as much as digits as its factorization.

138810163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 138810163 is about 11781.7724897402. The cubic root of 138810163 is about 517.7742179758.

Adding to 138810163 its reverse (361018831), we get a palindrome (499828994).

The spelling of 138810163 in words is "one hundred thirty-eight million, eight hundred ten thousand, one hundred sixty-three".