138498471 has 16 divisors (see below), whose sum is σ = 205452000. Its totient is φ = 92211264.

The previous prime is 138498427. The next prime is 138498497. The reversal of 138498471 is 174894831.

It is a happy number.

138498471 is a `hidden beast` number, since 13 + 84 + 98 + 471 = 666.

It is not a de Polignac number, because 138498471 - 2⁶ = 138498407 is a prime.

It is a super-3 number, since 3×138498471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138498401) 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 in 15 ways as a sum of consecutive naturals, for example, 20755 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (12840750).

Almost surely, 2^138498471 is an apocalyptic number.

138498471 is a deficient number, since it is larger than the sum of its proper divisors (66953529).

138498471 is an equidigital number, since it uses as much as digits as its factorization.

138498471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735 (or 6729 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 138498471 is about 11768.5373347753. The cubic root of 138498471 is about 517.3863812737.

The spelling of 138498471 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, four hundred seventy-one".