139209938 has 32 divisors (see below), whose sum is σ = 251645184. Its totient is φ = 56466432.

The previous prime is 139209919. The next prime is 139209943. The reversal of 139209938 is 839902931.

139209938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29006 + ... + 33462.

It is an arithmetic number, because the mean of its divisors is an integer number (7863912).

Almost surely, 2^139209938 is an apocalyptic number.

139209938 is a deficient number, since it is larger than the sum of its proper divisors (112435246).

139209938 is a wasteful number, since it uses less digits than its factorization.

139209938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 139209938 is about 11798.7261176790. The cubic root of 139209938 is about 518.2708069540.

The spelling of 139209938 in words is "one hundred thirty-nine million, two hundred nine thousand, nine hundred thirty-eight".