138886471 has 2 divisors, whose sum is σ = 138886472. Its totient is φ = 138886470.

The previous prime is 138886459. The next prime is 138886483. The reversal of 138886471 is 174688831.

138886471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (138886459) and next prime (138886483).

It is a cyclic number.

It is not a de Polignac number, because 138886471 - 2¹⁵ = 138853703 is a prime.

It is a super-3 number, since 3×138886471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138886411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69443235 + 69443236.

It is an arithmetic number, because the mean of its divisors is an integer number (69443236).

Almost surely, 2^138886471 is an apocalyptic number.

138886471 is a deficient number, since it is larger than the sum of its proper divisors (1).

138886471 is an equidigital number, since it uses as much as digits as its factorization.

138886471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 138886471 is about 11785.0104369916. The cubic root of 138886471 is about 517.8690791310.

The spelling of 138886471 in words is "one hundred thirty-eight million, eight hundred eighty-six thousand, four hundred seventy-one".