139582309 has 2 divisors, whose sum is σ = 139582310. Its totient is φ = 139582308.

The previous prime is 139582301. The next prime is 139582319. The reversal of 139582309 is 903285931.

139582309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75742209 + 63840100 = 8703^2 + 7990^2 .

It is an emirp because it is prime and its reverse (903285931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139582309 - 2³ = 139582301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139582301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69791154 + 69791155.

It is an arithmetic number, because the mean of its divisors is an integer number (69791155).

Almost surely, 2^139582309 is an apocalyptic number.

It is an amenable number.

139582309 is a deficient number, since it is larger than the sum of its proper divisors (1).

139582309 is an equidigital number, since it uses as much as digits as its factorization.

139582309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 139582309 is about 11814.4957150104. The cubic root of 139582309 is about 518.7325010016.

The spelling of 139582309 in words is "one hundred thirty-nine million, five hundred eighty-two thousand, three hundred nine".