139163944 has 16 divisors (see below), whose sum is σ = 261061920. Its totient is φ = 69547440.

The previous prime is 139163909. The next prime is 139163971. The reversal of 139163944 is 449361931.

It is a junction number, because it is equal to n+sod(n) for n = 139163897 and 139163906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22909 + ... + 28339.

It is an arithmetic number, because the mean of its divisors is an integer number (16316370).

Almost surely, 2^139163944 is an apocalyptic number.

It is an amenable number.

139163944 is a deficient number, since it is larger than the sum of its proper divisors (121897976).

139163944 is a wasteful number, since it uses less digits than its factorization.

139163944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8640 (or 8636 counting only the distinct ones).

The product of its digits is 69984, while the sum is 40.

The square root of 139163944 is about 11796.7768479360. The cubic root of 139163944 is about 518.2137229710.

The spelling of 139163944 in words is "one hundred thirty-nine million, one hundred sixty-three thousand, nine hundred forty-four".