139628959 has 4 divisors (see below), whose sum is σ = 139672240. Its totient is φ = 139585680.

The previous prime is 139628953. The next prime is 139629001. The reversal of 139628959 is 959826931.

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

It is a cyclic number.

It is not a de Polignac number, because 139628959 - 2¹¹ = 139626911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139628953) 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, 16374 + ... + 23395.

It is an arithmetic number, because the mean of its divisors is an integer number (34918060).

Almost surely, 2^139628959 is an apocalyptic number.

139628959 is a deficient number, since it is larger than the sum of its proper divisors (43281).

139628959 is an equidigital number, since it uses as much as digits as its factorization.

139628959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43280.

The product of its digits is 1049760, while the sum is 52.

The square root of 139628959 is about 11816.4698197050. The cubic root of 139628959 is about 518.7902833381.

The spelling of 139628959 in words is "one hundred thirty-nine million, six hundred twenty-eight thousand, nine hundred fifty-nine".