138477 has 8 divisors (see below), whose sum is σ = 190720. Its totient is φ = 89280.

The previous prime is 138469. The next prime is 138493. The reversal of 138477 is 774831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138477 - 2³ = 138469 is a prime.

It is a Duffinian number.

138477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652 + ... + 837.

It is an arithmetic number, because the mean of its divisors is an integer number (23840).

2¹³⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

138477 is a deficient number, since it is larger than the sum of its proper divisors (52243).

138477 is a wasteful number, since it uses less digits than its factorization.

138477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its digits is 4704, while the sum is 30.

The square root of 138477 is about 372.1249790057. The cubic root of 138477 is about 51.7359643609.

The spelling of 138477 in words is "one hundred thirty-eight thousand, four hundred seventy-seven".