313440109 has 2 divisors, whose sum is σ = 313440110. Its totient is φ = 313440108.

The previous prime is 313440059. The next prime is 313440139. The reversal of 313440109 is 901044313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172186884 + 141253225 = 13122^2 + 11885^2 .

It is a cyclic number.

It is not a de Polignac number, because 313440109 - 2⁹ = 313439597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313440139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156720054 + 156720055.

It is an arithmetic number, because the mean of its divisors is an integer number (156720055).

Almost surely, 2^313440109 is an apocalyptic number.

It is an amenable number.

313440109 is a deficient number, since it is larger than the sum of its proper divisors (1).

313440109 is an equidigital number, since it uses as much as digits as its factorization.

313440109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 313440109 is about 17704.2398594235. The cubic root of 313440109 is about 679.2842158152.

The spelling of 313440109 in words is "three hundred thirteen million, four hundred forty thousand, one hundred nine".