138232947 has 8 divisors (see below), whose sum is σ = 184592080. Its totient is φ = 92014560.

The previous prime is 138232909. The next prime is 138232949. The reversal of 138232947 is 749232831.

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

It is not a de Polignac number, because 138232947 - 2¹⁰ = 138231923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138232949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32872 + ... + 36837.

It is an arithmetic number, because the mean of its divisors is an integer number (23074010).

Almost surely, 2^138232947 is an apocalyptic number.

138232947 is a deficient number, since it is larger than the sum of its proper divisors (46359133).

138232947 is an equidigital number, since it uses as much as digits as its factorization.

138232947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70373.

The product of its digits is 72576, while the sum is 39.

The square root of 138232947 is about 11757.2508266176. The cubic root of 138232947 is about 517.0555319235.

The spelling of 138232947 in words is "one hundred thirty-eight million, two hundred thirty-two thousand, nine hundred forty-seven".