139805968 has 10 divisors (see below), whose sum is σ = 270874094. Its totient is φ = 69902976.

The previous prime is 139805957. The next prime is 139805969. The reversal of 139805968 is 869508931.

139805968 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 only one way, i.e., 124813584 + 14992384 = 11172^2 + 3872^2 .

It is not an unprimeable number, because it can be changed into a prime (139805969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4368921 + ... + 4368952.

Almost surely, 2^139805968 is an apocalyptic number.

It is an amenable number.

139805968 is a deficient number, since it is larger than the sum of its proper divisors (131068126).

139805968 is an equidigital number, since it uses as much as digits as its factorization.

139805968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8737881 (or 8737875 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 139805968 is about 11823.9573747540. The cubic root of 139805968 is about 519.0094159411.

The spelling of 139805968 in words is "one hundred thirty-nine million, eight hundred five thousand, nine hundred sixty-eight".