138665948023 has 2 divisors, whose sum is σ = 138665948024. Its totient is φ = 138665948022.

The previous prime is 138665948021. The next prime is 138665948033. The reversal of 138665948023 is 320849566831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138665948023 - 2¹ = 138665948021 is a prime.

It is a super-2 number, since 2×138665948023² (a number of 23 digits) contains 22 as substring.

Together with 138665948021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138665948021) 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, 69332974011 + 69332974012.

It is an arithmetic number, because the mean of its divisors is an integer number (69332974012).

Almost surely, 2^138665948023 is an apocalyptic number.

138665948023 is a deficient number, since it is larger than the sum of its proper divisors (1).

138665948023 is an equidigital number, since it uses as much as digits as its factorization.

138665948023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 138665948023 in words is "one hundred thirty-eight billion, six hundred sixty-five million, nine hundred forty-eight thousand, twenty-three".