138463 has 4 divisors (see below), whose sum is σ = 149128. Its totient is φ = 127800.

The previous prime is 138461. The next prime is 138469. The reversal of 138463 is 364831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364831 = 137 ⋅2663.

It is a cyclic number.

It is not a de Polignac number, because 138463 - 2¹ = 138461 is a prime.

It is a Duffinian number.

138463 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138461) 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 3 ways as a sum of consecutive naturals, for example, 5313 + ... + 5338.

It is an arithmetic number, because the mean of its divisors is an integer number (37282).

2¹³⁸⁴⁶³ is an apocalyptic number.

138463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138463 is a deficient number, since it is larger than the sum of its proper divisors (10665).

138463 is a wasteful number, since it uses less digits than its factorization.

138463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10664.

The product of its digits is 1728, while the sum is 25.

The square root of 138463 is about 372.1061676457. The cubic root of 138463 is about 51.7342208032.

The spelling of 138463 in words is "one hundred thirty-eight thousand, four hundred sixty-three".