313203109 has 2 divisors, whose sum is σ = 313203110. Its totient is φ = 313203108.

The previous prime is 313203083. The next prime is 313203119. The reversal of 313203109 is 901302313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248850625 + 64352484 = 15775^2 + 8022^2 .

It is a cyclic number.

It is not a de Polignac number, because 313203109 - 2²⁷ = 178985381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313203109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313203119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156601554 + 156601555.

It is an arithmetic number, because the mean of its divisors is an integer number (156601555).

Almost surely, 2^313203109 is an apocalyptic number.

It is an amenable number.

313203109 is a deficient number, since it is larger than the sum of its proper divisors (1).

313203109 is an equidigital number, since it uses as much as digits as its factorization.

313203109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 313203109 is about 17697.5452817615. The cubic root of 313203109 is about 679.1129646491.

The spelling of 313203109 in words is "three hundred thirteen million, two hundred three thousand, one hundred nine".