138404147 has 16 divisors (see below), whose sum is σ = 163918080. Its totient is φ = 114402912.

The previous prime is 138404093. The next prime is 138404207. The reversal of 138404147 is 741404831.

It is a cyclic number.

It is not a de Polignac number, because 138404147 - 2⁶ = 138404083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138404047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18728 + ... + 25050.

It is an arithmetic number, because the mean of its divisors is an integer number (10244880).

Almost surely, 2^138404147 is an apocalyptic number.

138404147 is a deficient number, since it is larger than the sum of its proper divisors (25513933).

138404147 is an equidigital number, since it uses as much as digits as its factorization.

138404147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 138404147 is about 11764.5291873496. The cubic root of 138404147 is about 517.2688997456.

Adding to 138404147 its reverse (741404831), we get a palindrome (879808978).

The spelling of 138404147 in words is "one hundred thirty-eight million, four hundred four thousand, one hundred forty-seven".