138616149 has 24 divisors (see below), whose sum is σ = 216165888. Its totient is φ = 78778560.

The previous prime is 138616139. The next prime is 138616183. The reversal of 138616149 is 941616831.

It is not a de Polignac number, because 138616149 - 2⁵ = 138616117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138616109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25609 + ... + 30545.

It is an arithmetic number, because the mean of its divisors is an integer number (9006912).

Almost surely, 2^138616149 is an apocalyptic number.

It is an amenable number.

138616149 is a deficient number, since it is larger than the sum of its proper divisors (77549739).

138616149 is a wasteful number, since it uses less digits than its factorization.

138616149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145 (or 5138 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 138616149 is about 11773.5359599400. The cubic root of 138616149 is about 517.5328756915.

The spelling of 138616149 in words is "one hundred thirty-eight million, six hundred sixteen thousand, one hundred forty-nine".