138650217 has 4 divisors (see below), whose sum is σ = 184866960. Its totient is φ = 92433476.

The previous prime is 138650207. The next prime is 138650219. The reversal of 138650217 is 712056831.

138650217 is nontrivially palindromic in base 15.

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 a cyclic number.

It is not a de Polignac number, because 138650217 - 2⁶ = 138650153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138650219) 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, 23108367 + ... + 23108372.

It is an arithmetic number, because the mean of its divisors is an integer number (46216740).

Almost surely, 2^138650217 is an apocalyptic number.

It is an amenable number.

138650217 is a deficient number, since it is larger than the sum of its proper divisors (46216743).

138650217 is an equidigital number, since it uses as much as digits as its factorization.

138650217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46216742.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 138650217 is about 11774.9826751465. The cubic root of 138650217 is about 517.5752706215.

The spelling of 138650217 in words is "one hundred thirty-eight million, six hundred fifty thousand, two hundred seventeen".