138873722 has 24 divisors (see below), whose sum is σ = 227090556. Its totient is φ = 63662976.

The previous prime is 138873719. The next prime is 138873733. The reversal of 138873722 is 227378831.

138873722 is digitally balanced in base 3, 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 6 ways, for example, as 44609041 + 94264681 = 6679^2 + 9709^2 .

It is a cake number, because a cake can be divided into 138873722 parts by 941 planar cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 138873722.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 51758 + ... + 54374.

Almost surely, 2^138873722 is an apocalyptic number.

138873722 is a deficient number, since it is larger than the sum of its proper divisors (88216834).

138873722 is a wasteful number, since it uses less digits than its factorization.

138873722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802 (or 2789 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 138873722 is about 11784.4695256087. The cubic root of 138873722 is about 517.8532328194.

The spelling of 138873722 in words is "one hundred thirty-eight million, eight hundred seventy-three thousand, seven hundred twenty-two".