139213868 has 12 divisors (see below), whose sum is σ = 243867792. Its totient is φ = 69537360.

The previous prime is 139213861. The next prime is 139213883. The reversal of 139213868 is 868312931.

139213868 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (139213861) 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 3 ways as a sum of consecutive naturals, for example, 12755 + ... + 21002.

It is an arithmetic number, because the mean of its divisors is an integer number (20322316).

Almost surely, 2^139213868 is an apocalyptic number.

It is an amenable number.

139213868 is a deficient number, since it is larger than the sum of its proper divisors (104653924).

139213868 is a wasteful number, since it uses less digits than its factorization.

139213868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34792 (or 34790 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 139213868 is about 11798.8926599067. The cubic root of 139213868 is about 518.2756839648.

The spelling of 139213868 in words is "one hundred thirty-nine million, two hundred thirteen thousand, eight hundred sixty-eight".