138236049 has 24 divisors (see below), whose sum is σ = 238123392. Its totient is φ = 75556800.

The previous prime is 138236041. The next prime is 138236083. The reversal of 138236049 is 940632831.

It is not a de Polignac number, because 138236049 - 2³ = 138236041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138236041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46252 + ... + 49149.

It is an arithmetic number, because the mean of its divisors is an integer number (9921808).

Almost surely, 2^138236049 is an apocalyptic number.

It is an amenable number.

138236049 is a deficient number, since it is larger than the sum of its proper divisors (99887343).

138236049 is a wasteful number, since it uses less digits than its factorization.

138236049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95437 (or 95434 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 138236049 is about 11757.3827444717. The cubic root of 138236049 is about 517.0593995356.

The spelling of 138236049 in words is "one hundred thirty-eight million, two hundred thirty-six thousand, forty-nine".