138616349 has 4 divisors (see below), whose sum is σ = 138741564. Its totient is φ = 138491136.

The previous prime is 138616337. The next prime is 138616369. The reversal of 138616349 is 943616831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13579225 + 125037124 = 3685^2 + 11182^2 .

It is a cyclic number.

It is not a de Polignac number, because 138616349 - 2¹⁶ = 138550813 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 (138616369) 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, 60932 + ... + 63165.

It is an arithmetic number, because the mean of its divisors is an integer number (34685391).

Almost surely, 2^138616349 is an apocalyptic number.

It is an amenable number.

138616349 is a deficient number, since it is larger than the sum of its proper divisors (125215).

138616349 is a wasteful number, since it uses less digits than its factorization.

138616349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125214.

The product of its digits is 93312, while the sum is 41.

The square root of 138616349 is about 11773.5444535620. The cubic root of 138616349 is about 517.5331245960.

The spelling of 138616349 in words is "one hundred thirty-eight million, six hundred sixteen thousand, three hundred forty-nine".