139289833 has 4 divisors (see below), whose sum is σ = 142687188. Its totient is φ = 135892480.

The previous prime is 139289809. The next prime is 139289849. The reversal of 139289833 is 338982931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64432729 + 74857104 = 8027^2 + 8652^2 .

It is a cyclic number.

It is not a de Polignac number, because 139289833 - 2⁹ = 139289321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139289333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1698616 + ... + 1698697.

It is an arithmetic number, because the mean of its divisors is an integer number (35671797).

Almost surely, 2^139289833 is an apocalyptic number.

It is an amenable number.

139289833 is a deficient number, since it is larger than the sum of its proper divisors (3397355).

139289833 is an equidigital number, since it uses as much as digits as its factorization.

139289833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397354.

The product of its digits is 279936, while the sum is 46.

The square root of 139289833 is about 11802.1113789017. Note that the first 3 decimals coincide. The cubic root of 139289833 is about 518.3699361967.

It can be divided in two parts, 1392898 and 33, that added together give a palindrome (1392931).

The spelling of 139289833 in words is "one hundred thirty-nine million, two hundred eighty-nine thousand, eight hundred thirty-three".