138016471 has 2 divisors, whose sum is σ = 138016472. Its totient is φ = 138016470.

The previous prime is 138016469. The next prime is 138016477. The reversal of 138016471 is 174610831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138016471 - 2¹ = 138016469 is a prime.

It is a super-3 number, since 3×138016471³ (a number of 25 digits) contains 333 as substring.

Together with 138016469, 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 (138016477) 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, 69008235 + 69008236.

It is an arithmetic number, because the mean of its divisors is an integer number (69008236).

Almost surely, 2^138016471 is an apocalyptic number.

138016471 is a deficient number, since it is larger than the sum of its proper divisors (1).

138016471 is an equidigital number, since it uses as much as digits as its factorization.

138016471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 138016471 is about 11748.0411558693. The cubic root of 138016471 is about 516.7854839235.

The spelling of 138016471 in words is "one hundred thirty-eight million, sixteen thousand, four hundred seventy-one".