138606263 has 2 divisors, whose sum is σ = 138606264. Its totient is φ = 138606262.

The previous prime is 138606229. The next prime is 138606269. The reversal of 138606263 is 362606831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138606263 - 2²⁴ = 121829047 is a prime.

It is a super-2 number, since 2×138606263² = 38423392285650338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138606269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69303131 + 69303132.

It is an arithmetic number, because the mean of its divisors is an integer number (69303132).

Almost surely, 2^138606263 is an apocalyptic number.

138606263 is a deficient number, since it is larger than the sum of its proper divisors (1).

138606263 is an equidigital number, since it uses as much as digits as its factorization.

138606263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 138606263 is about 11773.1161125676. The cubic root of 138606263 is about 517.5205720466.

The spelling of 138606263 in words is "one hundred thirty-eight million, six hundred six thousand, two hundred sixty-three".