139335668 has 6 divisors (see below), whose sum is σ = 243837426. Its totient is φ = 69667832.

The previous prime is 139335649. The next prime is 139335733. The reversal of 139335668 is 866533931.

139335668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 40094224 = 9962^2 + 6332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17416955 + ... + 17416962.

It is an arithmetic number, because the mean of its divisors is an integer number (40639571).

Almost surely, 2^139335668 is an apocalyptic number.

It is an amenable number.

139335668 is a deficient number, since it is larger than the sum of its proper divisors (104501758).

139335668 is a wasteful number, since it uses less digits than its factorization.

139335668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34833921 (or 34833919 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 139335668 is about 11804.0530327511. The cubic root of 139335668 is about 518.4267885883.

The spelling of 139335668 in words is "one hundred thirty-nine million, three hundred thirty-five thousand, six hundred sixty-eight".