313440139 has 2 divisors, whose sum is σ = 313440140. Its totient is φ = 313440138.

The previous prime is 313440109. The next prime is 313440187. The reversal of 313440139 is 931044313.

It is a weak prime.

It is an emirp because it is prime and its reverse (931044313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313440139 - 2¹⁵ = 313407371 is a prime.

It is not a weakly prime, because it can be changed into another prime (313440109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156720069 + 156720070.

It is an arithmetic number, because the mean of its divisors is an integer number (156720070).

Almost surely, 2^313440139 is an apocalyptic number.

313440139 is a deficient number, since it is larger than the sum of its proper divisors (1).

313440139 is an equidigital number, since it uses as much as digits as its factorization.

313440139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 313440139 is about 17704.2407066782. The cubic root of 313440139 is about 679.2842374871.

The spelling of 313440139 in words is "three hundred thirteen million, four hundred forty thousand, one hundred thirty-nine".