138063506 has 8 divisors (see below), whose sum is σ = 236680320. Its totient is φ = 59170068.

The previous prime is 138063493. The next prime is 138063509. The reversal of 138063506 is 605360831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (138063509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4930826 + ... + 4930853.

It is an arithmetic number, because the mean of its divisors is an integer number (29585040).

Almost surely, 2^138063506 is an apocalyptic number.

138063506 is a deficient number, since it is larger than the sum of its proper divisors (98616814).

138063506 is an equidigital number, since it uses as much as digits as its factorization.

138063506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861688.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 138063506 is about 11750.0428084327. The cubic root of 138063506 is about 516.8441828222.

The spelling of 138063506 in words is "one hundred thirty-eight million, sixty-three thousand, five hundred six".