138350217 has 4 divisors (see below), whose sum is σ = 184466960. Its totient is φ = 92233476.

The previous prime is 138350207. The next prime is 138350237. The reversal of 138350217 is 712053831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138350217 - 2⁷ = 138350089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138350207) 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 3 ways as a sum of consecutive naturals, for example, 23058367 + ... + 23058372.

It is an arithmetic number, because the mean of its divisors is an integer number (46116740).

Almost surely, 2^138350217 is an apocalyptic number.

It is an amenable number.

138350217 is a deficient number, since it is larger than the sum of its proper divisors (46116743).

138350217 is an equidigital number, since it uses as much as digits as its factorization.

138350217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46116742.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 138350217 is about 11762.2369046028. The cubic root of 138350217 is about 517.2017053816.

The spelling of 138350217 in words is "one hundred thirty-eight million, three hundred fifty thousand, two hundred seventeen".