138438147 has 8 divisors (see below), whose sum is σ = 187339456. Its totient is φ = 90914472.

The previous prime is 138438133. The next prime is 138438151. The reversal of 138438147 is 741834831.

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

It is not a de Polignac number, because 138438147 - 2¹⁴ = 138421763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138438347) 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, 344173 + ... + 344574.

It is an arithmetic number, because the mean of its divisors is an integer number (23417432).

Almost surely, 2^138438147 is an apocalyptic number.

138438147 is a deficient number, since it is larger than the sum of its proper divisors (48901309).

138438147 is an equidigital number, since it uses as much as digits as its factorization.

138438147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688817.

The product of its digits is 64512, while the sum is 39.

The square root of 138438147 is about 11765.9741203183. The cubic root of 138438147 is about 517.3112532517.

The spelling of 138438147 in words is "one hundred thirty-eight million, four hundred thirty-eight thousand, one hundred forty-seven".