138824499 has 32 divisors (see below), whose sum is σ = 215550720. Its totient is φ = 78540800.

The previous prime is 138824489. The next prime is 138824501. The reversal of 138824499 is 994428831.

It is a cyclic number.

It is not a de Polignac number, because 138824499 - 2⁵ = 138824467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138824459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72547 + ... + 74435.

It is an arithmetic number, because the mean of its divisors is an integer number (6735960).

Almost surely, 2^138824499 is an apocalyptic number.

138824499 is a deficient number, since it is larger than the sum of its proper divisors (76726221).

138824499 is a wasteful number, since it uses less digits than its factorization.

138824499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

The product of its digits is 497664, while the sum is 48.

The square root of 138824499 is about 11782.3808714538. The cubic root of 138824499 is about 517.7920422127.

It can be divided in two parts, 13882 and 4499, that added together give a palindrome (18381).

The spelling of 138824499 in words is "one hundred thirty-eight million, eight hundred twenty-four thousand, four hundred ninety-nine".