313138884209 has 4 divisors (see below), whose sum is σ = 313159153140. Its totient is φ = 313118615280.

The previous prime is 313138884193. The next prime is 313138884229. The reversal of 313138884209 is 902488831313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113280711184 + 199858173025 = 336572^2 + 447055^2 .

It is a cyclic number.

It is not a de Polignac number, because 313138884209 - 2⁴ = 313138884193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313138884229) 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, 10111274 + ... + 10142195.

It is an arithmetic number, because the mean of its divisors is an integer number (78289788285).

Almost surely, 2^313138884209 is an apocalyptic number.

It is an amenable number.

313138884209 is a deficient number, since it is larger than the sum of its proper divisors (20268931).

313138884209 is a wasteful number, since it uses less digits than its factorization.

313138884209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20268930.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 313138884209 in words is "three hundred thirteen billion, one hundred thirty-eight million, eight hundred eighty-four thousand, two hundred nine".