317121109 has 4 divisors (see below), whose sum is σ = 317226220. Its totient is φ = 317016000.

The previous prime is 317121097. The next prime is 317121121. The reversal of 317121109 is 901121713.

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

It is an interprime number because it is at equal distance from previous prime (317121097) and next prime (317121121).

It can be written as a sum of positive squares in 2 ways, for example, as 32524209 + 284596900 = 5703^2 + 16870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317121109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317121139) 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, 47892 + ... + 54109.

It is an arithmetic number, because the mean of its divisors is an integer number (79306555).

Almost surely, 2^317121109 is an apocalyptic number.

It is an amenable number.

317121109 is a deficient number, since it is larger than the sum of its proper divisors (105111).

317121109 is a wasteful number, since it uses less digits than its factorization.

317121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105110.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 317121109 is about 17807.8945695441. The cubic root of 317121109 is about 681.9330155830.

The spelling of 317121109 in words is "three hundred seventeen million, one hundred twenty-one thousand, one hundred nine".