138650461 has 4 divisors (see below), whose sum is σ = 138692412. Its totient is φ = 138608512.

The previous prime is 138650459. The next prime is 138650471. The reversal of 138650461 is 164056831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164056831 = 9323 ⋅17597.

It can be written as a sum of positive squares in 2 ways, for example, as 34222500 + 104427961 = 5850^2 + 10219^2 .

It is a cyclic number.

It is not a de Polignac number, because 138650461 - 2¹ = 138650459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138650471) 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, 15550 + ... + 22783.

It is an arithmetic number, because the mean of its divisors is an integer number (34673103).

Almost surely, 2^138650461 is an apocalyptic number.

It is an amenable number.

138650461 is a deficient number, since it is larger than the sum of its proper divisors (41951).

138650461 is an equidigital number, since it uses as much as digits as its factorization.

138650461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41950.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 138650461 is about 11774.9930360914. The cubic root of 138650461 is about 517.5755742351.

The spelling of 138650461 in words is "one hundred thirty-eight million, six hundred fifty thousand, four hundred sixty-one".