139585913 has 4 divisors (see below), whose sum is σ = 146932560. Its totient is φ = 132239268.

The previous prime is 139585889. The next prime is 139585921. The reversal of 139585913 is 319585931.

139585913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139585913 - 2²⁰ = 138537337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139585013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3673295 + ... + 3673332.

It is an arithmetic number, because the mean of its divisors is an integer number (36733140).

Almost surely, 2^139585913 is an apocalyptic number.

It is an amenable number.

139585913 is a deficient number, since it is larger than the sum of its proper divisors (7346647).

139585913 is an equidigital number, since it uses as much as digits as its factorization.

139585913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346646.

The product of its digits is 145800, while the sum is 44.

The square root of 139585913 is about 11814.6482385215. The cubic root of 139585913 is about 518.7369655021.

The spelling of 139585913 in words is "one hundred thirty-nine million, five hundred eighty-five thousand, nine hundred thirteen".