138608361 has 16 divisors (see below), whose sum is σ = 217425600. Its totient is φ = 86969664.

The previous prime is 138608341. The next prime is 138608377. The reversal of 138608361 is 163806831.

138608361 is a `hidden beast` number, since 13 + 8 + 608 + 36 + 1 = 666.

It is not a de Polignac number, because 138608361 - 2¹⁴ = 138591977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138608321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150531 + ... + 151448.

It is an arithmetic number, because the mean of its divisors is an integer number (13589100).

Almost surely, 2^138608361 is an apocalyptic number.

It is an amenable number.

138608361 is a deficient number, since it is larger than the sum of its proper divisors (78817239).

138608361 is a wasteful number, since it uses less digits than its factorization.

138608361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302005 (or 301999 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 138608361 is about 11773.2052135347. The cubic root of 138608361 is about 517.5231831664.

The spelling of 138608361 in words is "one hundred thirty-eight million, six hundred eight thousand, three hundred sixty-one".