138622999 has 4 divisors (see below), whose sum is σ = 138805920. Its totient is φ = 138440080.

The previous prime is 138622949. The next prime is 138623011. The reversal of 138622999 is 999226831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138622999 - 2⁹ = 138622487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138622949) 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, 90319 + ... + 91840.

It is an arithmetic number, because the mean of its divisors is an integer number (34701480).

Almost surely, 2^138622999 is an apocalyptic number.

138622999 is a deficient number, since it is larger than the sum of its proper divisors (182921).

138622999 is an equidigital number, since it uses as much as digits as its factorization.

138622999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182920.

The product of its digits is 419904, while the sum is 49.

The square root of 138622999 is about 11773.8268630042. The cubic root of 138622999 is about 517.5414005323.

It can be divided in two parts, 13862 and 2999, that added together give a palindrome (16861).

The spelling of 138622999 in words is "one hundred thirty-eight million, six hundred twenty-two thousand, nine hundred ninety-nine".