138549101 has 4 divisors (see below), whose sum is σ = 138911232. Its totient is φ = 138186972.

The previous prime is 138549097. The next prime is 138549107. The reversal of 138549101 is 101945831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101945831 = 13 ⋅7841987.

It is a cyclic number.

It is not a de Polignac number, because 138549101 - 2² = 138549097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138549107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180491 + ... + 181256.

It is an arithmetic number, because the mean of its divisors is an integer number (34727808).

Almost surely, 2^138549101 is an apocalyptic number.

It is an amenable number.

138549101 is a deficient number, since it is larger than the sum of its proper divisors (362131).

138549101 is an equidigital number, since it uses as much as digits as its factorization.

138549101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362130.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 138549101 is about 11770.6882126747. The cubic root of 138549101 is about 517.4494194693.

The spelling of 138549101 in words is "one hundred thirty-eight million, five hundred forty-nine thousand, one hundred one".